ASoC: rockchip: support ACODEC for rk3328

This patch adds support for audio CODEC core of rk3328.

Rockchip does not publish detail specification of this core
but driver source code is opened on their GitHub repository.
  https://github.com/rockchip-linux/kernel

So I ported this code to linux-next and added some trivial fixes.
Signed-off-by: Katsuhiro Suzuki <katsuhiro@katsuster.net>
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/rockchip,rk3328-codec.txt

+* Rockchip Rk3328 internal codec
+
+Required properties:
+
+- compatible: "rockchip,rk3328-codec"
+- reg: physical base address of the controller and length of memory mapped
+  region.
+- rockchip,grf: the phandle of the syscon node for GRF register.
+- clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names.
+- clock-names: should be "pclk".
+- spk-depop-time-ms: speak depop time msec.
+
+Example for rk3328 internal codec:
+
+codec: codec@ff410000 {
+	compatible = "rockchip,rk3328-codec";
+	reg = <0x0 0xff410000 0x0 0x1000>;
+	rockchip,grf = <&grf>;
+	clocks = <&cru PCLK_ACODEC>;
+	clock-names = "pclk";
+	spk-depop-time-ms = 100;
+	status = "disabled";
+};

sound/soc/codecs/Kconfig

@@ -130,6 +130,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_PCM5102A
 	select SND_SOC_PCM512x_I2C if I2C
 	select SND_SOC_PCM512x_SPI if SPI_MASTER
+	select SND_SOC_RK3328
 	select SND_SOC_RT274 if I2C
 	select SND_SOC_RT286 if I2C
 	select SND_SOC_RT298 if I2C
@@ -806,6 +807,10 @@ config SND_SOC_PCM512x_SPI
 	select SND_SOC_PCM512x
 	select REGMAP_SPI
 
+config SND_SOC_RK3328
+	tristate "Rockchip RK3328 audio CODEC"
+	select REGMAP_MMIO
+
 config SND_SOC_RL6231
 	tristate
 	default y if SND_SOC_RT5514=y

sound/soc/codecs/Makefile

@@ -133,6 +133,7 @@ snd-soc-pcm5102a-objs := pcm5102a.o
 snd-soc-pcm512x-objs := pcm512x.o
 snd-soc-pcm512x-i2c-objs := pcm512x-i2c.o
 snd-soc-pcm512x-spi-objs := pcm512x-spi.o
+snd-soc-rk3328-objs := rk3328_codec.o
 snd-soc-rl6231-objs := rl6231.o
 snd-soc-rl6347a-objs := rl6347a.o
 snd-soc-rt1305-objs := rt1305.o
@@ -400,6 +401,7 @@ obj-$(CONFIG_SND_SOC_PCM5102A)	+= snd-soc-pcm5102a.o
 obj-$(CONFIG_SND_SOC_PCM512x)	+= snd-soc-pcm512x.o
 obj-$(CONFIG_SND_SOC_PCM512x_I2C)	+= snd-soc-pcm512x-i2c.o
 obj-$(CONFIG_SND_SOC_PCM512x_SPI)	+= snd-soc-pcm512x-spi.o
+obj-$(CONFIG_SND_SOC_RK3328)	+= snd-soc-rk3328.o
 obj-$(CONFIG_SND_SOC_RL6231)	+= snd-soc-rl6231.o
 obj-$(CONFIG_SND_SOC_RL6347A)	+= snd-soc-rl6347a.o
 obj-$(CONFIG_SND_SOC_RT1305)	+= snd-soc-rt1305.o

sound/soc/codecs/rk3328_codec.c

+// SPDX-License-Identifier: GPL-2.0
+//
+// rk3328 ALSA SoC Audio driver
+//
+// Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd All rights reserved.
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+#include "rk3328_codec.h"
+
+/*
+ * volume setting
+ * 0: -39dB
+ * 26: 0dB
+ * 31: 6dB
+ * Step: 1.5dB
+ */
+#define OUT_VOLUME	(0x18)
+#define RK3328_GRF_SOC_CON2	(0x0408)
+#define RK3328_GRF_SOC_CON10	(0x0428)
+#define INITIAL_FREQ	(11289600)
+
+struct rk3328_codec_priv {
+	struct regmap *regmap;
+	struct regmap *grf;
+	struct clk *mclk;
+	struct clk *pclk;
+	unsigned int sclk;
+	int spk_depop_time; /* msec */
+};
+
+static const struct reg_default rk3328_codec_reg_defaults[] = {
+	{ CODEC_RESET, 0x03 },
+	{ DAC_INIT_CTRL1, 0x00 },
+	{ DAC_INIT_CTRL2, 0x50 },
+	{ DAC_INIT_CTRL3, 0x0e },
+	{ DAC_PRECHARGE_CTRL, 0x01 },
+	{ DAC_PWR_CTRL, 0x00 },
+	{ DAC_CLK_CTRL, 0x00 },
+	{ HPMIX_CTRL, 0x00 },
+	{ HPOUT_CTRL, 0x00 },
+	{ HPOUTL_GAIN_CTRL, 0x00 },
+	{ HPOUTR_GAIN_CTRL, 0x00 },
+	{ HPOUT_POP_CTRL, 0x11 },
+};
+
+static int rk3328_codec_reset(struct rk3328_codec_priv *rk3328)
+{
+	regmap_write(rk3328->regmap, CODEC_RESET, 0x00);
+	mdelay(10);
+	regmap_write(rk3328->regmap, CODEC_RESET, 0x03);
+
+	return 0;
+}
+
+static int rk3328_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct rk3328_codec_priv *rk3328 =
+		snd_soc_component_get_drvdata(dai->component);
+	unsigned int val;
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		val = PIN_DIRECTION_IN | DAC_I2S_MODE_SLAVE;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFM:
+		val = PIN_DIRECTION_OUT | DAC_I2S_MODE_MASTER;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	regmap_update_bits(rk3328->regmap, DAC_INIT_CTRL1,
+			   PIN_DIRECTION_MASK | DAC_I2S_MODE_MASK, val);
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_DSP_A:
+	case SND_SOC_DAIFMT_DSP_B:
+		val = DAC_MODE_PCM;
+		break;
+	case SND_SOC_DAIFMT_I2S:
+		val = DAC_MODE_I2S;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		val = DAC_MODE_RJM;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		val = DAC_MODE_LJM;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	regmap_update_bits(rk3328->regmap, DAC_INIT_CTRL2,
+			   DAC_MODE_MASK, val);
+
+	return 0;
+}
+
+static void rk3328_analog_output(struct rk3328_codec_priv *rk3328, int mute)
+{
+	unsigned int val = BIT(17);
+
+	if (mute)
+		val |= BIT(1);
+
+	regmap_write(rk3328->grf, RK3328_GRF_SOC_CON10, val);
+}
+
+static int rk3328_digital_mute(struct snd_soc_dai *dai, int mute)
+{
+	struct rk3328_codec_priv *rk3328 =
+		snd_soc_component_get_drvdata(dai->component);
+	unsigned int val;
+
+	if (mute)
+		val = HPOUTL_MUTE | HPOUTR_MUTE;
+	else
+		val = HPOUTL_UNMUTE | HPOUTR_UNMUTE;
+
+	regmap_update_bits(rk3328->regmap, HPOUT_CTRL,
+			   HPOUTL_MUTE_MASK | HPOUTR_MUTE_MASK, val);
+
+	return 0;
+}
+
+static int rk3328_codec_power_on(struct rk3328_codec_priv *rk3328, int wait_ms)
+{
+	regmap_update_bits(rk3328->regmap, DAC_PRECHARGE_CTRL,
+			   DAC_CHARGE_XCHARGE_MASK, DAC_CHARGE_PRECHARGE);
+	mdelay(10);
+	regmap_update_bits(rk3328->regmap, DAC_PRECHARGE_CTRL,
+			   DAC_CHARGE_CURRENT_ALL_MASK,
+			   DAC_CHARGE_CURRENT_ALL_ON);
+	mdelay(wait_ms);
+
+	return 0;
+}
+
+static int rk3328_codec_power_off(struct rk3328_codec_priv *rk3328, int wait_ms)
+{
+	regmap_update_bits(rk3328->regmap, DAC_PRECHARGE_CTRL,
+			   DAC_CHARGE_XCHARGE_MASK, DAC_CHARGE_DISCHARGE);
+	mdelay(10);
+	regmap_update_bits(rk3328->regmap, DAC_PRECHARGE_CTRL,
+			   DAC_CHARGE_CURRENT_ALL_MASK,
+			   DAC_CHARGE_CURRENT_ALL_ON);
+	mdelay(wait_ms);
+
+	return 0;
+}
+
+static const struct rk3328_reg_msk_val playback_open_list[] = {
+	{ DAC_PWR_CTRL, DAC_PWR_MASK, DAC_PWR_ON },
+	{ DAC_PWR_CTRL, DACL_PATH_REFV_MASK | DACR_PATH_REFV_MASK,
+	  DACL_PATH_REFV_ON | DACR_PATH_REFV_ON },
+	{ DAC_PWR_CTRL, HPOUTL_ZERO_CROSSING_MASK | HPOUTR_ZERO_CROSSING_MASK,
+	  HPOUTL_ZERO_CROSSING_ON | HPOUTR_ZERO_CROSSING_ON },
+	{ HPOUT_POP_CTRL, HPOUTR_POP_MASK | HPOUTL_POP_MASK,
+	  HPOUTR_POP_WORK | HPOUTL_POP_WORK },
+	{ HPMIX_CTRL, HPMIXL_MASK | HPMIXR_MASK, HPMIXL_EN | HPMIXR_EN },
+	{ HPMIX_CTRL, HPMIXL_INIT_MASK | HPMIXR_INIT_MASK,
+	  HPMIXL_INIT_EN | HPMIXR_INIT_EN },
+	{ HPOUT_CTRL, HPOUTL_MASK | HPOUTR_MASK, HPOUTL_EN | HPOUTR_EN },
+	{ HPOUT_CTRL, HPOUTL_INIT_MASK | HPOUTR_INIT_MASK,
+	  HPOUTL_INIT_EN | HPOUTR_INIT_EN },
+	{ DAC_CLK_CTRL, DACL_REFV_MASK | DACR_REFV_MASK,
+	  DACL_REFV_ON | DACR_REFV_ON },
+	{ DAC_CLK_CTRL, DACL_CLK_MASK | DACR_CLK_MASK,
+	  DACL_CLK_ON | DACR_CLK_ON },
+	{ DAC_CLK_CTRL, DACL_MASK | DACR_MASK, DACL_ON | DACR_ON },
+	{ DAC_CLK_CTRL, DACL_INIT_MASK | DACR_INIT_MASK,
+	  DACL_INIT_ON | DACR_INIT_ON },
+	{ DAC_SELECT, DACL_SELECT_MASK | DACR_SELECT_MASK,
+	  DACL_SELECT | DACR_SELECT },
+	{ HPMIX_CTRL, HPMIXL_INIT2_MASK | HPMIXR_INIT2_MASK,
+	  HPMIXL_INIT2_EN | HPMIXR_INIT2_EN },
+	{ HPOUT_CTRL, HPOUTL_MUTE_MASK | HPOUTR_MUTE_MASK,
+	  HPOUTL_UNMUTE | HPOUTR_UNMUTE },
+};
+
+static int rk3328_codec_open_playback(struct rk3328_codec_priv *rk3328)
+{
+	int i;
+
+	regmap_update_bits(rk3328->regmap, DAC_PRECHARGE_CTRL,
+			   DAC_CHARGE_CURRENT_ALL_MASK,
+			   DAC_CHARGE_CURRENT_I);
+
+	for (i = 0; i < ARRAY_SIZE(playback_open_list); i++) {
+		regmap_update_bits(rk3328->regmap,
+				   playback_open_list[i].reg,
+				   playback_open_list[i].msk,
+				   playback_open_list[i].val);
+		mdelay(1);
+	}
+
+	msleep(rk3328->spk_depop_time);
+	rk3328_analog_output(rk3328, 1);
+
+	regmap_update_bits(rk3328->regmap, HPOUTL_GAIN_CTRL,
+			   HPOUTL_GAIN_MASK, OUT_VOLUME);
+	regmap_update_bits(rk3328->regmap, HPOUTR_GAIN_CTRL,
+			   HPOUTR_GAIN_MASK, OUT_VOLUME);
+
+	return 0;
+}
+
+static const struct rk3328_reg_msk_val playback_close_list[] = {
+	{ HPMIX_CTRL, HPMIXL_INIT2_MASK | HPMIXR_INIT2_MASK,
+	  HPMIXL_INIT2_DIS | HPMIXR_INIT2_DIS },
+	{ DAC_SELECT, DACL_SELECT_MASK | DACR_SELECT_MASK,
+	  DACL_UNSELECT | DACR_UNSELECT },
+	{ HPOUT_CTRL, HPOUTL_MUTE_MASK | HPOUTR_MUTE_MASK,
+	  HPOUTL_MUTE | HPOUTR_MUTE },
+	{ HPOUT_CTRL, HPOUTL_INIT_MASK | HPOUTR_INIT_MASK,
+	  HPOUTL_INIT_DIS | HPOUTR_INIT_DIS },
+	{ HPOUT_CTRL, HPOUTL_MASK | HPOUTR_MASK, HPOUTL_DIS | HPOUTR_DIS },
+	{ HPMIX_CTRL, HPMIXL_MASK | HPMIXR_MASK, HPMIXL_DIS | HPMIXR_DIS },
+	{ DAC_CLK_CTRL, DACL_MASK | DACR_MASK, DACL_OFF | DACR_OFF },
+	{ DAC_CLK_CTRL, DACL_CLK_MASK | DACR_CLK_MASK,
+	  DACL_CLK_OFF | DACR_CLK_OFF },
+	{ DAC_CLK_CTRL, DACL_REFV_MASK | DACR_REFV_MASK,
+	  DACL_REFV_OFF | DACR_REFV_OFF },
+	{ HPOUT_POP_CTRL, HPOUTR_POP_MASK | HPOUTL_POP_MASK,
+	  HPOUTR_POP_XCHARGE | HPOUTL_POP_XCHARGE },
+	{ DAC_PWR_CTRL, DACL_PATH_REFV_MASK | DACR_PATH_REFV_MASK,
+	  DACL_PATH_REFV_OFF | DACR_PATH_REFV_OFF },
+	{ DAC_PWR_CTRL, DAC_PWR_MASK, DAC_PWR_OFF },
+	{ HPMIX_CTRL, HPMIXL_INIT_MASK | HPMIXR_INIT_MASK,
+	  HPMIXL_INIT_DIS | HPMIXR_INIT_DIS },
+	{ DAC_CLK_CTRL, DACL_INIT_MASK | DACR_INIT_MASK,
+	  DACL_INIT_OFF | DACR_INIT_OFF },
+};
+
+static int rk3328_codec_close_playback(struct rk3328_codec_priv *rk3328)
+{
+	size_t i;
+
+	rk3328_analog_output(rk3328, 0);
+
+	regmap_update_bits(rk3328->regmap, HPOUTL_GAIN_CTRL,
+			   HPOUTL_GAIN_MASK, 0);
+	regmap_update_bits(rk3328->regmap, HPOUTR_GAIN_CTRL,
+			   HPOUTR_GAIN_MASK, 0);
+
+	for (i = 0; i < ARRAY_SIZE(playback_close_list); i++) {
+		regmap_update_bits(rk3328->regmap,
+				   playback_close_list[i].reg,
+				   playback_close_list[i].msk,
+				   playback_close_list[i].val);
+		mdelay(1);
+	}
+
+	regmap_update_bits(rk3328->regmap, DAC_PRECHARGE_CTRL,
+			   DAC_CHARGE_CURRENT_ALL_MASK,
+			   DAC_CHARGE_CURRENT_I);
+
+	return 0;
+}
+
+static int rk3328_hw_params(struct snd_pcm_substream *substream,
+			    struct snd_pcm_hw_params *params,
+			    struct snd_soc_dai *dai)
+{
+	struct rk3328_codec_priv *rk3328 =
+		snd_soc_component_get_drvdata(dai->component);
+	unsigned int val = 0;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		val = DAC_VDL_16BITS;
+		break;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		val = DAC_VDL_20BITS;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		val = DAC_VDL_24BITS;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		val = DAC_VDL_32BITS;
+		break;
+	default:
+		return -EINVAL;
+	}
+	regmap_update_bits(rk3328->regmap, DAC_INIT_CTRL2, DAC_VDL_MASK, val);
+
+	val = DAC_WL_32BITS | DAC_RST_DIS;
+	regmap_update_bits(rk3328->regmap, DAC_INIT_CTRL3,
+			   DAC_WL_MASK | DAC_RST_MASK, val);
+
+	return 0;
+}
+
+static int rk3328_pcm_startup(struct snd_pcm_substream *substream,
+			      struct snd_soc_dai *dai)
+{
+	struct rk3328_codec_priv *rk3328 =
+		snd_soc_component_get_drvdata(dai->component);
+
+	return rk3328_codec_open_playback(rk3328);
+}
+
+static void rk3328_pcm_shutdown(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct rk3328_codec_priv *rk3328 =
+		snd_soc_component_get_drvdata(dai->component);
+
+	rk3328_codec_close_playback(rk3328);
+}
+
+static const struct snd_soc_dai_ops rk3328_dai_ops = {
+	.hw_params = rk3328_hw_params,
+	.set_fmt = rk3328_set_dai_fmt,
+	.digital_mute = rk3328_digital_mute,
+	.startup = rk3328_pcm_startup,
+	.shutdown = rk3328_pcm_shutdown,
+};
+
+static struct snd_soc_dai_driver rk3328_dai[] = {
+	{
+		.name = "rk3328-hifi",
+		.id = RK3328_HIFI,
+		.playback = {
+			.stream_name = "HIFI Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_96000,
+			.formats = (SNDRV_PCM_FMTBIT_S16_LE |
+				    SNDRV_PCM_FMTBIT_S20_3LE |
+				    SNDRV_PCM_FMTBIT_S24_LE |
+				    SNDRV_PCM_FMTBIT_S32_LE),
+		},
+		.capture = {
+			.stream_name = "HIFI Capture",
+			.channels_min = 2,
+			.channels_max = 8,
+			.rates = SNDRV_PCM_RATE_8000_96000,
+			.formats = (SNDRV_PCM_FMTBIT_S16_LE |
+				    SNDRV_PCM_FMTBIT_S20_3LE |
+				    SNDRV_PCM_FMTBIT_S24_LE |
+				    SNDRV_PCM_FMTBIT_S32_LE),
+		},
+		.ops = &rk3328_dai_ops,
+	},
+};
+
+static int rk3328_codec_probe(struct snd_soc_component *component)
+{
+	struct rk3328_codec_priv *rk3328 =
+		snd_soc_component_get_drvdata(component);
+
+	rk3328_codec_reset(rk3328);
+	rk3328_codec_power_on(rk3328, 0);
+
+	return 0;
+}
+
+static void rk3328_codec_remove(struct snd_soc_component *component)
+{
+	struct rk3328_codec_priv *rk3328 =
+		snd_soc_component_get_drvdata(component);
+
+	rk3328_codec_close_playback(rk3328);
+	rk3328_codec_power_off(rk3328, 0);
+}
+
+static const struct snd_soc_component_driver soc_codec_rk3328 = {
+	.probe = rk3328_codec_probe,
+	.remove = rk3328_codec_remove,
+};
+
+static bool rk3328_codec_write_read_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CODEC_RESET:
+	case DAC_INIT_CTRL1:
+	case DAC_INIT_CTRL2:
+	case DAC_INIT_CTRL3:
+	case DAC_PRECHARGE_CTRL:
+	case DAC_PWR_CTRL:
+	case DAC_CLK_CTRL:
+	case HPMIX_CTRL:
+	case DAC_SELECT:
+	case HPOUT_CTRL:
+	case HPOUTL_GAIN_CTRL:
+	case HPOUTR_GAIN_CTRL:
+	case HPOUT_POP_CTRL:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool rk3328_codec_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CODEC_RESET:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config rk3328_codec_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = HPOUT_POP_CTRL,
+	.writeable_reg = rk3328_codec_write_read_reg,
+	.readable_reg = rk3328_codec_write_read_reg,
+	.volatile_reg = rk3328_codec_volatile_reg,
+	.reg_defaults = rk3328_codec_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(rk3328_codec_reg_defaults),
+	.cache_type = REGCACHE_FLAT,
+};
+
+static int rk3328_platform_probe(struct platform_device *pdev)
+{
+	struct device_node *rk3328_np = pdev->dev.of_node;
+	struct rk3328_codec_priv *rk3328;
+	struct resource *res;
+	struct regmap *grf;
+	void __iomem *base;
+	int ret = 0;
+
+	rk3328 = devm_kzalloc(&pdev->dev, sizeof(*rk3328), GFP_KERNEL);
+	if (!rk3328)
+		return -ENOMEM;
+
+	grf = syscon_regmap_lookup_by_phandle(rk3328_np,
+					      "rockchip,grf");
+	if (IS_ERR(grf)) {
+		dev_err(&pdev->dev, "missing 'rockchip,grf'\n");
+		return PTR_ERR(grf);
+	}
+	rk3328->grf = grf;
+	/* enable i2s_acodec_en */
+	regmap_write(grf, RK3328_GRF_SOC_CON2,
+		     (BIT(14) << 16 | BIT(14)));
+
+	ret = of_property_read_u32(rk3328_np, "spk-depop-time-ms",
+				   &rk3328->spk_depop_time);
+	if (ret < 0) {
+		dev_info(&pdev->dev, "spk_depop_time use default value.\n");
+		rk3328->spk_depop_time = 200;
+	}
+
+	rk3328_analog_output(rk3328, 0);
+
+	rk3328->mclk = devm_clk_get(&pdev->dev, "mclk");
+	if (IS_ERR(rk3328->mclk))
+		return PTR_ERR(rk3328->mclk);
+
+	ret = clk_prepare_enable(rk3328->mclk);
+	if (ret)
+		return ret;
+	clk_set_rate(rk3328->mclk, INITIAL_FREQ);
+
+	rk3328->pclk = devm_clk_get(&pdev->dev, "pclk");
+	if (IS_ERR(rk3328->pclk)) {
+		dev_err(&pdev->dev, "can't get acodec pclk\n");
+		return PTR_ERR(rk3328->pclk);
+	}
+
+	ret = clk_prepare_enable(rk3328->pclk);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to enable acodec pclk\n");
+		return ret;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	rk3328->regmap = devm_regmap_init_mmio(&pdev->dev, base,
+					       &rk3328_codec_regmap_config);
+	if (IS_ERR(rk3328->regmap))
+		return PTR_ERR(rk3328->regmap);
+
+	platform_set_drvdata(pdev, rk3328);
+
+	return devm_snd_soc_register_component(&pdev->dev, &soc_codec_rk3328,
+					       rk3328_dai,
+					       ARRAY_SIZE(rk3328_dai));
+}
+
+static const struct of_device_id rk3328_codec_of_match[] = {
+		{ .compatible = "rockchip,rk3328-codec", },
+		{},
+};
+MODULE_DEVICE_TABLE(of, rk3328_codec_of_match);
+
+static struct platform_driver rk3328_codec_driver = {
+	.driver = {
+		   .name = "rk3328-codec",
+		   .owner = THIS_MODULE,
+		   .of_match_table = of_match_ptr(rk3328_codec_of_match),
+	},
+	.probe = rk3328_platform_probe,
+};
+module_platform_driver(rk3328_codec_driver);
+
+MODULE_AUTHOR("Sugar Zhang <sugar.zhang@rock-chips.com>");
+MODULE_DESCRIPTION("ASoC rk3328 codec driver");
+MODULE_LICENSE("GPL v2");

sound/soc/codecs/rk3328_codec.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * rk3328 ALSA SoC Audio driver
+ *
+ * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd All rights reserved.
+ */
+
+#ifndef _RK3328_CODEC_H
+#define _RK3328_CODEC_H
+
+#include <linux/bitfield.h>
+
+/* codec register */
+#define CODEC_RESET			(0x00 << 2)
+#define DAC_INIT_CTRL1			(0x03 << 2)
+#define DAC_INIT_CTRL2			(0x04 << 2)
+#define DAC_INIT_CTRL3			(0x05 << 2)
+#define DAC_PRECHARGE_CTRL		(0x22 << 2)
+#define DAC_PWR_CTRL			(0x23 << 2)
+#define DAC_CLK_CTRL			(0x24 << 2)
+#define HPMIX_CTRL			(0x25 << 2)
+#define DAC_SELECT			(0x26 << 2)
+#define HPOUT_CTRL			(0x27 << 2)
+#define HPOUTL_GAIN_CTRL		(0x28 << 2)
+#define HPOUTR_GAIN_CTRL		(0x29 << 2)
+#define HPOUT_POP_CTRL			(0x2a << 2)
+
+/* REG00: CODEC_RESET */
+#define PWR_RST_BYPASS_DIS		(0x0 << 6)
+#define PWR_RST_BYPASS_EN		(0x1 << 6)
+#define DIG_CORE_RST			(0x0 << 1)
+#define DIG_CORE_WORK			(0x1 << 1)
+#define SYS_RST				(0x0 << 0)
+#define SYS_WORK			(0x1 << 0)
+
+/* REG03: DAC_INIT_CTRL1 */
+#define PIN_DIRECTION_MASK		BIT(5)
+#define PIN_DIRECTION_IN		(0x0 << 5)
+#define PIN_DIRECTION_OUT		(0x1 << 5)
+#define DAC_I2S_MODE_MASK		BIT(4)
+#define DAC_I2S_MODE_SLAVE		(0x0 << 4)
+#define DAC_I2S_MODE_MASTER		(0x1 << 4)
+
+/* REG04: DAC_INIT_CTRL2 */
+#define DAC_I2S_LRP_MASK		BIT(7)
+#define DAC_I2S_LRP_NORMAL		(0x0 << 7)
+#define DAC_I2S_LRP_REVERSAL		(0x1 << 7)
+#define DAC_VDL_MASK			GENMASK(6, 5)
+#define DAC_VDL_16BITS			(0x0 << 5)
+#define DAC_VDL_20BITS			(0x1 << 5)
+#define DAC_VDL_24BITS			(0x2 << 5)
+#define DAC_VDL_32BITS			(0x3 << 5)
+#define DAC_MODE_MASK			GENMASK(4, 3)
+#define DAC_MODE_RJM			(0x0 << 3)
+#define DAC_MODE_LJM			(0x1 << 3)
+#define DAC_MODE_I2S			(0x2 << 3)
+#define DAC_MODE_PCM			(0x3 << 3)
+#define DAC_LR_SWAP_MASK		BIT(2)
+#define DAC_LR_SWAP_DIS			(0x0 << 2)
+#define DAC_LR_SWAP_EN			(0x1 << 2)
+
+/* REG05: DAC_INIT_CTRL3 */
+#define DAC_WL_MASK			GENMASK(3, 2)
+#define DAC_WL_16BITS			(0x0 << 2)
+#define DAC_WL_20BITS			(0x1 << 2)
+#define DAC_WL_24BITS			(0x2 << 2)
+#define DAC_WL_32BITS			(0x3 << 2)
+#define DAC_RST_MASK			BIT(1)
+#define DAC_RST_EN			(0x0 << 1)
+#define DAC_RST_DIS			(0x1 << 1)
+#define DAC_BCP_MASK			BIT(0)
+#define DAC_BCP_NORMAL			(0x0 << 0)
+#define DAC_BCP_REVERSAL		(0x1 << 0)
+
+/* REG22: DAC_PRECHARGE_CTRL */
+#define DAC_CHARGE_XCHARGE_MASK		BIT(7)
+#define DAC_CHARGE_DISCHARGE		(0x0 << 7)
+#define DAC_CHARGE_PRECHARGE		(0x1 << 7)
+#define DAC_CHARGE_CURRENT_64I_MASK	BIT(6)
+#define DAC_CHARGE_CURRENT_64I		(0x1 << 6)
+#define DAC_CHARGE_CURRENT_32I_MASK	BIT(5)
+#define DAC_CHARGE_CURRENT_32I		(0x1 << 5)
+#define DAC_CHARGE_CURRENT_16I_MASK	BIT(4)
+#define DAC_CHARGE_CURRENT_16I		(0x1 << 4)
+#define DAC_CHARGE_CURRENT_08I_MASK	BIT(3)
+#define DAC_CHARGE_CURRENT_08I		(0x1 << 3)
+#define DAC_CHARGE_CURRENT_04I_MASK	BIT(2)
+#define DAC_CHARGE_CURRENT_04I		(0x1 << 2)
+#define DAC_CHARGE_CURRENT_02I_MASK	BIT(1)
+#define DAC_CHARGE_CURRENT_02I		(0x1 << 1)
+#define DAC_CHARGE_CURRENT_I_MASK	BIT(0)
+#define DAC_CHARGE_CURRENT_I		(0x1 << 0)
+#define DAC_CHARGE_CURRENT_ALL_MASK	GENMASK(6, 0)
+#define DAC_CHARGE_CURRENT_ALL_OFF	0x00
+#define DAC_CHARGE_CURRENT_ALL_ON	0x7f
+
+/* REG23: DAC_PWR_CTRL */
+#define DAC_PWR_MASK			BIT(6)
+#define DAC_PWR_OFF			(0x0 << 6)
+#define DAC_PWR_ON			(0x1 << 6)
+#define DACL_PATH_REFV_MASK		BIT(5)
+#define DACL_PATH_REFV_OFF		(0x0 << 5)
+#define DACL_PATH_REFV_ON		(0x1 << 5)
+#define HPOUTL_ZERO_CROSSING_MASK	BIT(4)
+#define HPOUTL_ZERO_CROSSING_OFF	(0x0 << 4)
+#define HPOUTL_ZERO_CROSSING_ON		(0x1 << 4)
+#define DACR_PATH_REFV_MASK		BIT(1)
+#define DACR_PATH_REFV_OFF		(0x0 << 1)
+#define DACR_PATH_REFV_ON		(0x1 << 1)
+#define HPOUTR_ZERO_CROSSING_MASK	BIT(0)
+#define HPOUTR_ZERO_CROSSING_OFF	(0x0 << 0)
+#define HPOUTR_ZERO_CROSSING_ON		(0x1 << 0)
+
+/* REG24: DAC_CLK_CTRL */
+#define DACL_REFV_MASK			BIT(7)
+#define DACL_REFV_OFF			(0x0 << 7)
+#define DACL_REFV_ON			(0x1 << 7)
+#define DACL_CLK_MASK			BIT(6)
+#define DACL_CLK_OFF			(0x0 << 6)
+#define DACL_CLK_ON			(0x1 << 6)
+#define DACL_MASK			BIT(5)
+#define DACL_OFF			(0x0 << 5)
+#define DACL_ON				(0x1 << 5)
+#define DACL_INIT_MASK			BIT(4)
+#define DACL_INIT_OFF			(0x0 << 4)
+#define DACL_INIT_ON			(0x1 << 4)
+#define DACR_REFV_MASK			BIT(3)
+#define DACR_REFV_OFF			(0x0 << 3)
+#define DACR_REFV_ON			(0x1 << 3)
+#define DACR_CLK_MASK			BIT(2)
+#define DACR_CLK_OFF			(0x0 << 2)
+#define DACR_CLK_ON			(0x1 << 2)
+#define DACR_MASK			BIT(1)
+#define DACR_OFF			(0x0 << 1)
+#define DACR_ON				(0x1 << 1)
+#define DACR_INIT_MASK			BIT(0)
+#define DACR_INIT_OFF			(0x0 << 0)
+#define DACR_INIT_ON			(0x1 << 0)
+
+/* REG25: HPMIX_CTRL*/
+#define HPMIXL_MASK			BIT(6)
+#define HPMIXL_DIS			(0x0 << 6)
+#define HPMIXL_EN			(0x1 << 6)
+#define HPMIXL_INIT_MASK		BIT(5)
+#define HPMIXL_INIT_DIS			(0x0 << 5)
+#define HPMIXL_INIT_EN			(0x1 << 5)
+#define HPMIXL_INIT2_MASK		BIT(4)
+#define HPMIXL_INIT2_DIS		(0x0 << 4)
+#define HPMIXL_INIT2_EN			(0x1 << 4)
+#define HPMIXR_MASK			BIT(2)
+#define HPMIXR_DIS			(0x0 << 2)
+#define HPMIXR_EN			(0x1 << 2)
+#define HPMIXR_INIT_MASK		BIT(1)
+#define HPMIXR_INIT_DIS			(0x0 << 1)
+#define HPMIXR_INIT_EN			(0x1 << 1)
+#define HPMIXR_INIT2_MASK		BIT(0)
+#define HPMIXR_INIT2_DIS		(0x0 << 0)
+#define HPMIXR_INIT2_EN			(0x1 << 0)
+
+/* REG26: DAC_SELECT */
+#define DACL_SELECT_MASK		BIT(4)
+#define DACL_UNSELECT			(0x0 << 4)
+#define DACL_SELECT			(0x1 << 4)
+#define DACR_SELECT_MASK		BIT(0)
+#define DACR_UNSELECT			(0x0 << 0)
+#define DACR_SELECT			(0x1 << 0)
+
+/* REG27: HPOUT_CTRL */
+#define HPOUTL_MASK			BIT(7)
+#define HPOUTL_DIS			(0x0 << 7)
+#define HPOUTL_EN			(0x1 << 7)
+#define HPOUTL_INIT_MASK		BIT(6)
+#define HPOUTL_INIT_DIS			(0x0 << 6)
+#define HPOUTL_INIT_EN			(0x1 << 6)
+#define HPOUTL_MUTE_MASK		BIT(5)
+#define HPOUTL_MUTE			(0x0 << 5)
+#define HPOUTL_UNMUTE			(0x1 << 5)
+#define HPOUTR_MASK			BIT(4)
+#define HPOUTR_DIS			(0x0 << 4)
+#define HPOUTR_EN			(0x1 << 4)
+#define HPOUTR_INIT_MASK		BIT(3)
+#define HPOUTR_INIT_DIS			(0x0 << 3)
+#define HPOUTR_INIT_EN			(0x1 << 3)
+#define HPOUTR_MUTE_MASK		BIT(2)
+#define HPOUTR_MUTE			(0x0 << 2)
+#define HPOUTR_UNMUTE			(0x1 << 2)
+
+/* REG28: HPOUTL_GAIN_CTRL */
+#define HPOUTL_GAIN_MASK		GENMASK(4, 0)
+
+/* REG29: HPOUTR_GAIN_CTRL */
+#define HPOUTR_GAIN_MASK		GENMASK(4, 0)
+
+/* REG2a: HPOUT_POP_CTRL */
+#define HPOUTR_POP_MASK			GENMASK(5, 4)
+#define HPOUTR_POP_XCHARGE		(0x1 << 4)
+#define HPOUTR_POP_WORK			(0x2 << 4)
+#define HPOUTL_POP_MASK			GENMASK(1, 0)
+#define HPOUTL_POP_XCHARGE		(0x1 << 0)
+#define HPOUTL_POP_WORK			(0x2 << 0)
+
+#define RK3328_HIFI			0
+
+struct rk3328_reg_msk_val {
+	unsigned int reg;
+	unsigned int msk;
+	unsigned int val;
+};
+
+#endif