ASoC: nau8825: add programmable biquad filter control (18d8306d) · Commits · 戴 / test

sound/soc/codecs/nau8825.c

+53 −0

Original line number	Diff line number	Diff line
		@@ -217,6 +217,7 @@ static bool nau8825_volatile_reg(struct device *dev, unsigned int reg)
		case NAU8825_REG_SARDOUT_RAM_STATUS:
		case NAU8825_REG_CHARGE_PUMP_INPUT_READ:
		case NAU8825_REG_GENERAL_STATUS:
		case NAU8825_REG_BIQ_CTRL ... NAU8825_REG_BIQ_COF10:
		return true;
		default:
		return false;
		@@ -293,6 +294,54 @@ static int nau8825_output_dac_event(struct snd_soc_dapm_widget *w,
		return 0;
		}

		static int nau8825_biq_coeff_get(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
		{
		struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
		struct soc_bytes_ext params = (void )kcontrol->private_value;

		if (!component->regmap)
		return -EINVAL;

		regmap_raw_read(component->regmap, NAU8825_REG_BIQ_COF1,
		ucontrol->value.bytes.data, params->max);
		return 0;
		}

		static int nau8825_biq_coeff_put(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
		{
		struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
		struct soc_bytes_ext params = (void )kcontrol->private_value;
		void *data;

		if (!component->regmap)
		return -EINVAL;

		data = kmemdup(ucontrol->value.bytes.data,
		params->max, GFP_KERNEL \| GFP_DMA);
		if (!data)
		return -ENOMEM;

		regmap_update_bits(component->regmap, NAU8825_REG_BIQ_CTRL,
		NAU8825_BIQ_WRT_EN, 0);
		regmap_raw_write(component->regmap, NAU8825_REG_BIQ_COF1,
		data, params->max);
		regmap_update_bits(component->regmap, NAU8825_REG_BIQ_CTRL,
		NAU8825_BIQ_WRT_EN, NAU8825_BIQ_WRT_EN);

		kfree(data);
		return 0;
		}

		static const char * const nau8825_biq_path[] = {
		"ADC", "DAC"
		};

		static const struct soc_enum nau8825_biq_path_enum =
		SOC_ENUM_SINGLE(NAU8825_REG_BIQ_CTRL, NAU8825_BIQ_PATH_SFT,
		ARRAY_SIZE(nau8825_biq_path), nau8825_biq_path);

		static const char * const nau8825_adc_decimation[] = {
		"32", "64", "128", "256"
		};
		@@ -329,6 +378,10 @@ static const struct snd_kcontrol_new nau8825_controls[] = {

		SOC_ENUM("ADC Decimation Rate", nau8825_adc_decimation_enum),
		SOC_ENUM("DAC Oversampling Rate", nau8825_dac_oversampl_enum),
		/* programmable biquad filter */
		SOC_ENUM("BIQ Path Select", nau8825_biq_path_enum),
		SND_SOC_BYTES_EXT("BIQ Coefficeints", 20,
		nau8825_biq_coeff_get, nau8825_biq_coeff_put),
		};

		/* DAC Mux 0x33[9] and 0x34[9] */

sound/soc/codecs/nau8825.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -231,6 +231,14 @@
		#define NAU8825_I2S_MS_MASTER (1 << NAU8825_I2S_MS_SFT)
		#define NAU8825_I2S_MS_SLAVE (0 << NAU8825_I2S_MS_SFT)

		/* BIQ_CTRL (0x20) */
		#define NAU8825_BIQ_WRT_SFT 4
		#define NAU8825_BIQ_WRT_EN (1 << NAU8825_BIQ_WRT_SFT)
		#define NAU8825_BIQ_PATH_SFT 0
		#define NAU8825_BIQ_PATH_MASK (1 << NAU8825_BIQ_PATH_SFT)
		#define NAU8825_BIQ_PATH_ADC (0 << NAU8825_BIQ_PATH_SFT)
		#define NAU8825_BIQ_PATH_DAC (1 << NAU8825_BIQ_PATH_SFT)

		/* ADC_RATE (0x2b) */
		#define NAU8825_ADC_SYNC_DOWN_SFT 0
		#define NAU8825_ADC_SYNC_DOWN_MASK 0x3

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