ASoC: da7210: Add support for ALC and Noise suppression

This patch adds controls to set following ALC parameters,
 - Max gain, Min gain, Noise gain, Attack rate, Release rate and delay

It also adds a switch to enable/disable noise suppression.

As per DA7210 data sheet, ALC and noise suppression can be enabled
only if certain conditions are met. This condition checks are handled
by simply using "_EXT" version of controls to capture change events.

Signed-off-by: Ashish Chavan <ashish.chavan@kpitcummins.com>
Signed-off-by: David Dajun Chen <dchen@diasemi.com>
Acked-by: Liam Girdwod <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 110 insertions, 0 deletions

diff --git a/sound/soc/codecs/da7210.c b/sound/soc/codecs/da7210.c
index 4aad01c10c53..e9ee6a4faa26 100644
--- a/sound/soc/codecs/da7210.c
+++ b/sound/soc/codecs/da7210.c
@@ -26,11 +26,15 @@
 #include <sound/tlv.h>
 
 /* DA7210 register space */
+#define DA7210_CONTROL                  0x01
 #define DA7210_STATUS                   0x02
 #define DA7210_STARTUP1                 0x03
 #define DA7210_MIC_L                    0x07
 #define DA7210_MIC_R                    0x08
+#define DA7210_AUX1_L                   0x09
+#define DA7210_AUX1_R                   0x0A
 #define DA7210_AUX2                     0x0B
+#define DA7210_IN_GAIN                  0x0C
 #define DA7210_INMIX_L                  0x0D
 #define DA7210_INMIX_R                  0x0E
 #define DA7210_ADC_HPF                  0x0F
@@ -59,6 +63,12 @@
 #define DA7210_PLL_DIV2                 0x2A
 #define DA7210_PLL_DIV3                 0x2B
 #define DA7210_PLL                      0x2C
+#define DA7210_ALC_MAX                  0x83
+#define DA7210_ALC_MIN                  0x84
+#define DA7210_ALC_NOIS                 0x85
+#define DA7210_ALC_ATT                  0x86
+#define DA7210_ALC_REL                  0x87
+#define DA7210_ALC_DEL                  0x88
 #define DA7210_A_HID_UNLOCK             0x8A
 #define DA7210_A_TEST_UNLOCK            0x8B
 #define DA7210_A_PLL1                   0x90
@@ -81,6 +91,7 @@
 #define DA7210_IN_R_EN                  (1 << 7)
 
 /* ADC bit fields */
+#define DA7210_ADC_ALC_EN               (1 << 0)
 #define DA7210_ADC_L_EN                 (1 << 3)
 #define DA7210_ADC_R_EN                 (1 << 7)
 
@@ -150,6 +161,29 @@
 /* SOFTMUTE bit fields */
 #define DA7210_RAMP_EN                  (1 << 6)
 
+/* CONTROL bit fields */
+#define DA7210_NOISE_SUP_EN             (1 << 3)
+
+/* IN_GAIN bit fields */
+#define DA7210_INPGA_L_VOL              (0x0F << 0)
+#define DA7210_INPGA_R_VOL              (0xF0 << 0)
+
+/* ZERO_CROSS bit fields */
+#define DA7210_AUX1_L_ZC                (1 << 0)
+#define DA7210_AUX1_R_ZC                (1 << 1)
+#define DA7210_HP_L_ZC                  (1 << 6)
+#define DA7210_HP_R_ZC                  (1 << 7)
+
+/* AUX1_L bit fields */
+#define DA7210_AUX1_L_VOL               (0x3F << 0)
+
+/* AUX1_R bit fields */
+#define DA7210_AUX1_R_VOL               (0x3F << 0)
+
+/* Minimum INPGA and AUX1 volume to enable noise suppression */
+#define DA7210_INPGA_MIN_VOL_NS         0x0A  /* 10.5dB */
+#define DA7210_AUX1_MIN_VOL_NS          0x35  /* 6dB */
+
 #define DA7210_VERSION "0.0.1"
 
 /*
@@ -202,6 +236,69 @@ 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);
 
+/* 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)
+{
+        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+
+        if (ucontrol->value.integer.value[0]) {
+                /* Check if noise suppression is enabled */
+                if (snd_soc_read(codec, DA7210_CONTROL) & DA7210_NOISE_SUP_EN) {
+                        dev_dbg(codec->dev,
+                                "Disable noise suppression to enable ALC\n");
+                        return -EINVAL;
+                }
+        }
+        /* If all conditions are met or we are actually disabling ALC */
+        return snd_soc_put_volsw(kcontrol, ucontrol);
+}
+
+/* Noise suppression can be enabled only if following conditions are met
+ *  ALC disabled
+ *  ZC enabled for HP and AUX1 PGA
+ *  INPGA_L_VOL and INPGA_R_VOL >= 10.5 dB
+ *  AUX1_L_VOL and AUX1_R_VOL >= 6 dB
+ */
+static int da7210_put_noise_sup_sw(struct snd_kcontrol *kcontrol,
+                                   struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+        u8 val;
+
+        if (ucontrol->value.integer.value[0]) {
+                /* Check if ALC is enabled */
+                if (snd_soc_read(codec, DA7210_ADC) & DA7210_ADC_ALC_EN)
+                        goto err;
+
+                /* Check ZC for HP and AUX1 PGA */
+                if ((snd_soc_read(codec, DA7210_ZERO_CROSS) &
+                        (DA7210_AUX1_L_ZC | DA7210_AUX1_R_ZC | DA7210_HP_L_ZC |
+                        DA7210_HP_R_ZC)) != (DA7210_AUX1_L_ZC |
+                        DA7210_AUX1_R_ZC | DA7210_HP_L_ZC | DA7210_HP_R_ZC))
+                        goto err;
+
+                /* Check INPGA_L_VOL and INPGA_R_VOL */
+                val = snd_soc_read(codec, DA7210_IN_GAIN);
+                if (((val & DA7210_INPGA_L_VOL) < DA7210_INPGA_MIN_VOL_NS) ||
+                        (((val & DA7210_INPGA_R_VOL) >> 4) <
+                        DA7210_INPGA_MIN_VOL_NS))
+                        goto err;
+
+                /* Check AUX1_L_VOL and AUX1_R_VOL */
+                if (((snd_soc_read(codec, DA7210_AUX1_L) & DA7210_AUX1_L_VOL) <
+                    DA7210_AUX1_MIN_VOL_NS) ||
+                    ((snd_soc_read(codec, DA7210_AUX1_R) & DA7210_AUX1_R_VOL) <
+                    DA7210_AUX1_MIN_VOL_NS))
+                        goto err;
+        }
+        /* If all conditions are met or we are actually disabling Noise sup */
+        return snd_soc_put_volsw(kcontrol, ucontrol);
+
+err:
+        return -EINVAL;
+}
+
 static const struct snd_kcontrol_new da7210_snd_controls[] = {
 
         SOC_DOUBLE_R_TLV("HeadPhone Playback Volume",
@@ -260,6 +357,19 @@ static const struct snd_kcontrol_new da7210_snd_controls[] = {
         SOC_DOUBLE("Headphone ZC Switch", DA7210_ZERO_CROSS, 6, 7, 1, 0),
 
         SOC_ENUM("Headphone Class", da7210_hp_mode_sel),
+
+        /* ALC controls */
+        SOC_SINGLE_EXT("ALC Enable Switch", DA7210_ADC, 0, 1, 0,
+                       snd_soc_get_volsw, da7210_put_alc_sw),
+        SOC_SINGLE("ALC Capture Max Volume", DA7210_ALC_MAX, 0, 0x3F, 0),
+        SOC_SINGLE("ALC Capture Min Volume", DA7210_ALC_MIN, 0, 0x3F, 0),
+        SOC_SINGLE("ALC Capture Noise Volume", DA7210_ALC_NOIS, 0, 0x3F, 0),
+        SOC_SINGLE("ALC Capture Attack Rate", DA7210_ALC_ATT, 0, 0xFF, 0),
+        SOC_SINGLE("ALC Capture Release Rate", DA7210_ALC_REL, 0, 0xFF, 0),
+        SOC_SINGLE("ALC Capture Release Delay", DA7210_ALC_DEL, 0, 0xFF, 0),
+
+        SOC_SINGLE_EXT("Noise Suppression Enable Switch", DA7210_CONTROL, 3, 1,
+                       0, snd_soc_get_volsw, da7210_put_noise_sup_sw),
 };
 
 /* Codec private data */