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Subject[alsa-devel] [PATCH 8/9] ASoC: da7210: Add support for High pass and Voice filters for ADC and DAC
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This patch add controls for setting cut-off for high pass and voice
filters of ADC and DAC. There are also switches to enable/disable
these filters.

Also removed hard coded, fixed values of these parameters used by
previous version of driver.

Tested on Samsung SMDK6410 board with DA7210 evaluation board.

Signed-off-by: Ashish Chavan <ashish.chavan@kpitcummins.com>
Signed-off-by: David Dajun Chen <dchen@diasemi.com>
---
sound/soc/codecs/da7210.c | 57 +++++++++++++++++++++++++-------------------
1 files changed, 32 insertions(+), 25 deletions(-)

diff --git a/sound/soc/codecs/da7210.c b/sound/soc/codecs/da7210.c
index 9cab62a..2c6e47c 100644
--- a/sound/soc/codecs/da7210.c
+++ b/sound/soc/codecs/da7210.c
@@ -274,6 +274,28 @@ static const char *da7210_hp_mode_txt[] = {
static const struct soc_enum da7210_hp_mode_sel =
SOC_ENUM_SINGLE(DA7210_HP_CFG, 0, 2, da7210_hp_mode_txt);

+/* ADC and DAC high pass filter f0 value */
+static const char const *da7210_hpf_cutoff_txt[] = {
+ "Fs/8192*pi", "Fs/4096*pi", "Fs/2048*pi", "Fs/1024*pi"
+};
+
+static const struct soc_enum da7210_dac_hpf_cutoff =
+ SOC_ENUM_SINGLE(DA7210_DAC_HPF, 0, 4, da7210_hpf_cutoff_txt);
+
+static const struct soc_enum da7210_adc_hpf_cutoff =
+ SOC_ENUM_SINGLE(DA7210_ADC_HPF, 0, 4, da7210_hpf_cutoff_txt);
+
+/* ADC and DAC voice (8kHz) high pass cutoff value */
+static const char const *da7210_vf_cutoff_txt[] = {
+ "2.5Hz", "25Hz", "50Hz", "100Hz", "150Hz", "200Hz", "300Hz", "400Hz"
+};
+
+static const struct soc_enum da7210_dac_vf_cutoff =
+ SOC_ENUM_SINGLE(DA7210_DAC_HPF, 4, 8, da7210_vf_cutoff_txt);
+
+static const struct soc_enum da7210_adc_vf_cutoff =
+ SOC_ENUM_SINGLE(DA7210_ADC_HPF, 4, 8, da7210_vf_cutoff_txt);
+
/* ALC can be enabled only if noise suppression is disabled */
static int da7210_put_alc_sw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
@@ -426,6 +448,16 @@ static const struct snd_kcontrol_new da7210_snd_controls[] = {

SOC_SINGLE_EXT("Noise Suppression Enable Switch", DA7210_CONTROL, 3, 1,
0, snd_soc_get_volsw, da7210_put_noise_sup_sw),
+
+ SOC_SINGLE("DAC HPF Switch", DA7210_DAC_HPF, 3, 1, 0),
+ SOC_ENUM("DAC HPF Cutoff", da7210_dac_hpf_cutoff),
+ SOC_SINGLE("DAC Voice Mode Switch", DA7210_DAC_HPF, 7, 1, 0),
+ SOC_ENUM("DAC Voice Cutoff", da7210_dac_vf_cutoff),
+
+ SOC_SINGLE("ADC HPF Switch", DA7210_ADC_HPF, 3, 1, 0),
+ SOC_ENUM("ADC HPF Cutoff", da7210_adc_hpf_cutoff),
+ SOC_SINGLE("ADC Voice Mode Switch", DA7210_ADC_HPF, 7, 1, 0),
+ SOC_ENUM("ADC Voice Cutoff", da7210_adc_vf_cutoff),
};

/* Codec private data */
@@ -497,7 +529,6 @@ static int da7210_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec = rtd->codec;
u32 dai_cfg1;
- u32 hpf_reg, hpf_mask, hpf_value;
u32 fs, bypass;

/* set DAI source to Left and Right ADC */
@@ -528,68 +559,45 @@ static int da7210_hw_params(struct snd_pcm_substream *substream,

snd_soc_write(codec, DA7210_DAI_CFG1, dai_cfg1);

- hpf_reg = (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) ?
- DA7210_DAC_HPF : DA7210_ADC_HPF;
-
switch (params_rate(params)) {
case 8000:
fs = DA7210_PLL_FS_8000;
- hpf_mask = DA7210_VOICE_F0_MASK | DA7210_VOICE_EN;
- hpf_value = DA7210_VOICE_F0_25 | DA7210_VOICE_EN;
bypass = DA7210_PLL_BYP;
break;
case 11025:
fs = DA7210_PLL_FS_11025;
- hpf_mask = DA7210_VOICE_F0_MASK | DA7210_VOICE_EN;
- hpf_value = DA7210_VOICE_F0_25 | DA7210_VOICE_EN;
bypass = 0;
break;
case 12000:
fs = DA7210_PLL_FS_12000;
- hpf_mask = DA7210_VOICE_F0_MASK | DA7210_VOICE_EN;
- hpf_value = DA7210_VOICE_F0_25 | DA7210_VOICE_EN;
bypass = DA7210_PLL_BYP;
break;
case 16000:
fs = DA7210_PLL_FS_16000;
- hpf_mask = DA7210_VOICE_F0_MASK | DA7210_VOICE_EN;
- hpf_value = DA7210_VOICE_F0_25 | DA7210_VOICE_EN;
bypass = DA7210_PLL_BYP;
break;
case 22050:
fs = DA7210_PLL_FS_22050;
- hpf_mask = DA7210_VOICE_EN;
- hpf_value = 0;
bypass = 0;
break;
case 32000:
fs = DA7210_PLL_FS_32000;
- hpf_mask = DA7210_VOICE_EN;
- hpf_value = 0;
bypass = DA7210_PLL_BYP;
break;
case 44100:
fs = DA7210_PLL_FS_44100;
- hpf_mask = DA7210_VOICE_EN;
- hpf_value = 0;
bypass = 0;
break;
case 48000:
fs = DA7210_PLL_FS_48000;
- hpf_mask = DA7210_VOICE_EN;
- hpf_value = 0;
bypass = DA7210_PLL_BYP;
break;
case 88200:
fs = DA7210_PLL_FS_88200;
- hpf_mask = DA7210_VOICE_EN;
- hpf_value = 0;
bypass = 0;
break;
case 96000:
fs = DA7210_PLL_FS_96000;
- hpf_mask = DA7210_VOICE_EN;
- hpf_value = 0;
bypass = DA7210_PLL_BYP;
break;
default:
@@ -599,7 +607,6 @@ static int da7210_hw_params(struct snd_pcm_substream *substream,
/* Disable active mode */
snd_soc_update_bits(codec, DA7210_STARTUP1, DA7210_SC_MST_EN, 0);

- snd_soc_update_bits(codec, hpf_reg, hpf_mask, hpf_value);
snd_soc_update_bits(codec, DA7210_PLL, DA7210_PLL_FS_MASK, fs);
snd_soc_update_bits(codec, DA7210_PLL_DIV3, DA7210_PLL_BYP, bypass);

--
1.7.1



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