1 files changed, 535 insertions, 0 deletions

diff --git a/sound/soc/codecs/rk3328_codec.c b/sound/soc/codecs/rk3328_codec.c
new file mode 100644
index 000000000..1d523bfd9
--- /dev/null
+++ b/sound/soc/codecs/rk3328_codec.c
@@ -0,0 +1,535 @@
+// 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/gpio/consumer.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 gpio_desc *mute;
+	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_CLOCK_PROVIDER_MASK) {
+	case SND_SOC_DAIFMT_CBC_CFC:
+		val = PIN_DIRECTION_IN | DAC_I2S_MODE_SLAVE;
+		break;
+	case SND_SOC_DAIFMT_CBP_CFP:
+		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 int rk3328_mute_stream(struct snd_soc_dai *dai, int mute, int direction)
+{
+	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);
+	gpiod_set_value(rk3328->mute, 0);
+
+	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;
+
+	gpiod_set_value(rk3328->mute, 1);
+
+	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);
+	}
+
+	/* Workaround for silence when changed Fs 48 -> 44.1kHz */
+	rk3328_codec_reset(rk3328);
+
+	regmap_update_bits(rk3328->regmap, DAC_PRECHARGE_CTRL,
+			   DAC_CHARGE_CURRENT_ALL_MASK,
+			   DAC_CHARGE_CURRENT_ALL_ON);
+
+	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,
+	.mute_stream = rk3328_mute_stream,
+	.startup = rk3328_pcm_startup,
+	.shutdown = rk3328_pcm_shutdown,
+	.no_capture_mute = 1,
+};
+
+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 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);
+	}
+	/* 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->mute = gpiod_get_optional(&pdev->dev, "mute", GPIOD_OUT_HIGH);
+	if (IS_ERR(rk3328->mute))
+		return PTR_ERR(rk3328->mute);
+	/*
+	 * Rock64 is the only supported platform to have widely relied on
+	 * this; if we do happen to come across an old DTB, just leave the
+	 * external mute forced off.
+	 */
+	if (!rk3328->mute && of_machine_is_compatible("pine64,rock64")) {
+		dev_warn(&pdev->dev, "assuming implicit control of GPIO_MUTE; update devicetree if possible\n");
+		regmap_write(grf, RK3328_GRF_SOC_CON10, BIT(17) | BIT(1));
+	}
+
+	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");
+		ret = PTR_ERR(rk3328->pclk);
+		goto err_unprepare_mclk;
+	}
+
+	ret = clk_prepare_enable(rk3328->pclk);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to enable acodec pclk\n");
+		goto err_unprepare_mclk;
+	}
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base)) {
+		ret = PTR_ERR(base);
+		goto err_unprepare_pclk;
+	}
+
+	rk3328->regmap = devm_regmap_init_mmio(&pdev->dev, base,
+					       &rk3328_codec_regmap_config);
+	if (IS_ERR(rk3328->regmap)) {
+		ret = PTR_ERR(rk3328->regmap);
+		goto err_unprepare_pclk;
+	}
+
+	platform_set_drvdata(pdev, rk3328);
+
+	ret = devm_snd_soc_register_component(&pdev->dev, &soc_codec_rk3328,
+					       rk3328_dai,
+					       ARRAY_SIZE(rk3328_dai));
+	if (ret)
+		goto err_unprepare_pclk;
+
+	return 0;
+
+err_unprepare_pclk:
+	clk_disable_unprepare(rk3328->pclk);
+
+err_unprepare_mclk:
+	clk_disable_unprepare(rk3328->mclk);
+	return ret;
+}
+
+static const struct of_device_id rk3328_codec_of_match[] __maybe_unused = {
+		{ .compatible = "rockchip,rk3328-codec", },
+		{},
+};
+MODULE_DEVICE_TABLE(of, rk3328_codec_of_match);
+
+static struct platform_driver rk3328_codec_driver = {
+	.driver = {
+		   .name = "rk3328-codec",
+		   .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");