int adau17x1_setup_firmware(struct snd_soc_component *component,
unsigned int rate)
{
int ret;
int dspsr, dsp_run;
struct adau *adau = snd_soc_component_get_drvdata(component);
struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
/* Check if sample rate is the same as before. If it is there is no
* point in performing the below steps as the call to
* sigmadsp_setup(...) will return directly when it finds the sample
* rate to be the same as before. By checking this we can prevent an
* audiable popping noise which occours when toggling DSP_RUN.
*/
if (adau->sigmadsp->current_samplerate == rate)
return 0;
snd_soc_dapm_mutex_lock(dapm);
ret = regmap_read(adau->regmap, ADAU17X1_DSP_SAMPLING_RATE, &dspsr);
if (ret)
goto err;
ret = regmap_read(adau->regmap, ADAU17X1_DSP_RUN, &dsp_run);
if (ret)
goto err;
regmap_write(adau->regmap, ADAU17X1_DSP_ENABLE, 1);
regmap_write(adau->regmap, ADAU17X1_DSP_SAMPLING_RATE, 0xf);
regmap_write(adau->regmap, ADAU17X1_DSP_RUN, 0);
ret = sigmadsp_setup(adau->sigmadsp, rate);
if (ret) {
regmap_write(adau->regmap, ADAU17X1_DSP_ENABLE, 0);
goto err;
}
regmap_write(adau->regmap, ADAU17X1_DSP_SAMPLING_RATE, dspsr);
regmap_write(adau->regmap, ADAU17X1_DSP_RUN, dsp_run);
err:
snd_soc_dapm_mutex_unlock(dapm);
return ret;
}
int adau17x1_setup_firmware(struct adau *adau, unsigned int rate)
{
int ret;
int dspsr;
ret = regmap_read(adau->regmap, ADAU17X1_DSP_SAMPLING_RATE, &dspsr);
if (ret)
return ret;
regmap_write(adau->regmap, ADAU17X1_DSP_ENABLE, 1);
regmap_write(adau->regmap, ADAU17X1_DSP_SAMPLING_RATE, 0xf);
ret = sigmadsp_setup(adau->sigmadsp, rate);
if (ret) {
regmap_write(adau->regmap, ADAU17X1_DSP_ENABLE, 0);
return ret;
}
regmap_write(adau->regmap, ADAU17X1_DSP_SAMPLING_RATE, dspsr);
return 0;
}
static int adau1701_reset(struct snd_soc_codec *codec, unsigned int clkdiv,
unsigned int rate)
{
struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
int ret;
sigmadsp_reset(adau1701->sigmadsp);
if (clkdiv != ADAU1707_CLKDIV_UNSET &&
gpio_is_valid(adau1701->gpio_pll_mode[0]) &&
gpio_is_valid(adau1701->gpio_pll_mode[1])) {
switch (clkdiv) {
case 64:
gpio_set_value_cansleep(adau1701->gpio_pll_mode[0], 0);
gpio_set_value_cansleep(adau1701->gpio_pll_mode[1], 0);
break;
case 256:
gpio_set_value_cansleep(adau1701->gpio_pll_mode[0], 0);
gpio_set_value_cansleep(adau1701->gpio_pll_mode[1], 1);
break;
case 384:
gpio_set_value_cansleep(adau1701->gpio_pll_mode[0], 1);
gpio_set_value_cansleep(adau1701->gpio_pll_mode[1], 0);
break;
case 0: /* fallback */
case 512:
gpio_set_value_cansleep(adau1701->gpio_pll_mode[0], 1);
gpio_set_value_cansleep(adau1701->gpio_pll_mode[1], 1);
break;
}
}
adau1701->pll_clkdiv = clkdiv;
if (gpio_is_valid(adau1701->gpio_nreset)) {
gpio_set_value_cansleep(adau1701->gpio_nreset, 0);
/* minimum reset time is 20ns */
udelay(1);
gpio_set_value_cansleep(adau1701->gpio_nreset, 1);
/* power-up time may be as long as 85ms */
mdelay(85);
}
/*
* Postpone the firmware download to a point in time when we
* know the correct PLL setup
*/
if (clkdiv != ADAU1707_CLKDIV_UNSET) {
ret = sigmadsp_setup(adau1701->sigmadsp, rate);
if (ret) {
dev_warn(codec->dev, "Failed to load firmware\n");
return ret;
}
}
regmap_write(adau1701->regmap, ADAU1701_DACSET, ADAU1701_DACSET_DACINIT);
regmap_write(adau1701->regmap, ADAU1701_DSPCTRL, ADAU1701_DSPCTRL_CR);
regcache_mark_dirty(adau1701->regmap);
regcache_sync(adau1701->regmap);
return 0;
}
