ASoC: rt5514: The DSP clock can be calibrated by the other clock source

Add the option for the DSP clock that can be calibrated by the other clock
source.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

4 files changed, 92 insertions, 1 deletions

diff --git a/include/sound/rt5514.h b/include/sound/rt5514.h
index ef18494769ee..64d027dbaaca 100644
--- a/include/sound/rt5514.h
+++ b/include/sound/rt5514.h
@@ -14,6 +14,8 @@
 
 struct rt5514_platform_data {
         unsigned int dmic_init_delay;
+        const char *dsp_calib_clk_name;
+        unsigned int dsp_calib_clk_rate;
 };
 
 #endif
diff --git a/sound/soc/codecs/rt5514-spi.c b/sound/soc/codecs/rt5514-spi.c
index 12f2ecf3a4fe..b90d6d5d7ff8 100644
--- a/sound/soc/codecs/rt5514-spi.c
+++ b/sound/soc/codecs/rt5514-spi.c
@@ -370,6 +370,7 @@ int rt5514_spi_burst_read(unsigned int addr, u8 *rxbuf, size_t len)
 
         return true;
 }
+EXPORT_SYMBOL_GPL(rt5514_spi_burst_read);
 
 /**
  * rt5514_spi_burst_write - Write data to SPI by rt5514 address.
diff --git a/sound/soc/codecs/rt5514.c b/sound/soc/codecs/rt5514.c
index 2a5b5d74e697..61ccbc62125b 100644
--- a/sound/soc/codecs/rt5514.c
+++ b/sound/soc/codecs/rt5514.c
@@ -295,6 +295,33 @@ static int rt5514_dsp_voice_wake_up_get(struct snd_kcontrol *kcontrol,
         return 0;
 }
 
+static int rt5514_calibration(struct rt5514_priv *rt5514, bool on)
+{
+        if (on) {
+                regmap_write(rt5514->regmap, RT5514_ANA_CTRL_PLL3, 0x0000000a);
+                regmap_update_bits(rt5514->regmap, RT5514_PLL_SOURCE_CTRL, 0xf,
+                        0xa);
+                regmap_update_bits(rt5514->regmap, RT5514_PWR_ANA1, 0x301,
+                        0x301);
+                regmap_write(rt5514->regmap, RT5514_PLL3_CALIB_CTRL4,
+                        0x80000000 | rt5514->pll3_cal_value);
+                regmap_write(rt5514->regmap, RT5514_PLL3_CALIB_CTRL1,
+                        0x8bb80800);
+                regmap_update_bits(rt5514->regmap, RT5514_PLL3_CALIB_CTRL5,
+                        0xc0000000, 0x80000000);
+                regmap_update_bits(rt5514->regmap, RT5514_PLL3_CALIB_CTRL5,
+                        0xc0000000, 0xc0000000);
+        } else {
+                regmap_update_bits(rt5514->regmap, RT5514_PLL3_CALIB_CTRL5,
+                        0xc0000000, 0x40000000);
+                regmap_update_bits(rt5514->regmap, RT5514_PWR_ANA1, 0x301, 0);
+                regmap_update_bits(rt5514->regmap, RT5514_PLL_SOURCE_CTRL, 0xf,
+                        0x4);
+        }
+
+        return 0;
+}
+
 static int rt5514_dsp_voice_wake_up_put(struct snd_kcontrol *kcontrol,
                 struct snd_ctl_elem_value *ucontrol)
 {
@@ -302,6 +329,7 @@ static int rt5514_dsp_voice_wake_up_put(struct snd_kcontrol *kcontrol,
         struct rt5514_priv *rt5514 = snd_soc_component_get_drvdata(component);
         struct snd_soc_codec *codec = rt5514->codec;
         const struct firmware *fw = NULL;
+        u8 buf[8];
 
         if (ucontrol->value.integer.value[0] == rt5514->dsp_enabled)
                 return 0;
@@ -310,6 +338,35 @@ static int rt5514_dsp_voice_wake_up_put(struct snd_kcontrol *kcontrol,
                 rt5514->dsp_enabled = ucontrol->value.integer.value[0];
 
                 if (rt5514->dsp_enabled) {
+                        if (rt5514->pdata.dsp_calib_clk_name &&
+                                !IS_ERR(rt5514->dsp_calib_clk)) {
+                                if (clk_set_rate(rt5514->dsp_calib_clk,
+                                        rt5514->pdata.dsp_calib_clk_rate))
+                                        dev_err(codec->dev,
+                                                "Can't set rate for mclk");
+
+                                if (clk_prepare_enable(rt5514->dsp_calib_clk))
+                                        dev_err(codec->dev,
+                                                "Can't enable dsp_calib_clk");
+
+                                rt5514_calibration(rt5514, true);
+
+                                msleep(20);
+#if IS_ENABLED(CONFIG_SND_SOC_RT5514_SPI)
+                                rt5514_spi_burst_read(RT5514_PLL3_CALIB_CTRL6 |
+                                        RT5514_DSP_MAPPING,
+                                        (u8 *)&buf, sizeof(buf));
+#else
+                                dev_err(codec->dev, "There is no SPI driver for"
+                                        " loading the firmware\n");
+#endif
+                                rt5514->pll3_cal_value = buf[0] | buf[1] << 8 |
+                                        buf[2] << 16 | buf[3] << 24;
+
+                                rt5514_calibration(rt5514, false);
+                                clk_disable_unprepare(rt5514->dsp_calib_clk);
+                        }
+
                         rt5514_enable_dsp_prepare(rt5514);
 
                         request_firmware(&fw, RT5514_FIRMWARE1, codec->dev);
@@ -341,6 +398,20 @@ static int rt5514_dsp_voice_wake_up_put(struct snd_kcontrol *kcontrol,
                         /* DSP run */
                         regmap_write(rt5514->i2c_regmap, 0x18002f00,
                                 0x00055148);
+
+                        if (rt5514->pdata.dsp_calib_clk_name &&
+                                !IS_ERR(rt5514->dsp_calib_clk)) {
+                                msleep(20);
+
+                                regmap_write(rt5514->i2c_regmap, 0x1800211c,
+                                        rt5514->pll3_cal_value);
+                                regmap_write(rt5514->i2c_regmap, 0x18002124,
+                                        0x00220012);
+                                regmap_write(rt5514->i2c_regmap, 0x18002124,
+                                        0x80220042);
+                                regmap_write(rt5514->i2c_regmap, 0x18002124,
+                                        0xe0220042);
+                        }
                 } else {
                         regmap_multi_reg_write(rt5514->i2c_regmap,
                                 rt5514_i2c_patch, ARRAY_SIZE(rt5514_i2c_patch));
@@ -1024,12 +1095,22 @@ static int rt5514_set_bias_level(struct snd_soc_codec *codec,
 static int rt5514_probe(struct snd_soc_codec *codec)
 {
         struct rt5514_priv *rt5514 = snd_soc_codec_get_drvdata(codec);
+        struct platform_device *pdev = container_of(codec->dev,
+                                                   struct platform_device, dev);
 
         rt5514->mclk = devm_clk_get(codec->dev, "mclk");
         if (PTR_ERR(rt5514->mclk) == -EPROBE_DEFER)
                 return -EPROBE_DEFER;
 
+        if (rt5514->pdata.dsp_calib_clk_name) {
+                rt5514->dsp_calib_clk = devm_clk_get(&pdev->dev,
+                                rt5514->pdata.dsp_calib_clk_name);
+                if (PTR_ERR(rt5514->dsp_calib_clk) == -EPROBE_DEFER)
+                        return -EPROBE_DEFER;
+        }
+
         rt5514->codec = codec;
+        rt5514->pll3_cal_value = 0x0078b000;
 
         return 0;
 }
@@ -1147,6 +1228,10 @@ static int rt5514_parse_dp(struct rt5514_priv *rt5514, struct device *dev)
 {
         device_property_read_u32(dev, "realtek,dmic-init-delay-ms",
                 &rt5514->pdata.dmic_init_delay);
+        device_property_read_string(dev, "realtek,dsp-calib-clk-name",
+                &rt5514->pdata.dsp_calib_clk_name);
+        device_property_read_u32(dev, "realtek,dsp-calib-clk-rate",
+                &rt5514->pdata.dsp_calib_clk_rate);
 
         return 0;
 }
diff --git a/sound/soc/codecs/rt5514.h b/sound/soc/codecs/rt5514.h
index 2dc40e6d8b3f..f0f3400ce6b1 100644
--- a/sound/soc/codecs/rt5514.h
+++ b/sound/soc/codecs/rt5514.h
@@ -34,7 +34,9 @@
 #define RT5514_CLK_CTRL1                        0x2104
 #define RT5514_CLK_CTRL2                        0x2108
 #define RT5514_PLL3_CALIB_CTRL1                 0x2110
+#define RT5514_PLL3_CALIB_CTRL4                 0x2120
 #define RT5514_PLL3_CALIB_CTRL5                 0x2124
+#define RT5514_PLL3_CALIB_CTRL6                 0x2128
 #define RT5514_DELAY_BUF_CTRL1                  0x2140
 #define RT5514_DELAY_BUF_CTRL3                  0x2148
 #define RT5514_ASRC_IN_CTRL1                    0x2180
@@ -272,7 +274,7 @@ struct rt5514_priv {
         struct rt5514_platform_data pdata;
         struct snd_soc_codec *codec;
         struct regmap *i2c_regmap, *regmap;
-        struct clk *mclk;
+        struct clk *mclk, *dsp_calib_clk;
         int sysclk;
         int sysclk_src;
         int lrck;
@@ -281,6 +283,7 @@ struct rt5514_priv {
         int pll_in;
         int pll_out;
         int dsp_enabled;
+        unsigned int pll3_cal_value;
 };
 
 #endif /* __RT5514_H__ */