Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 620 insertions, 0 deletions

diff --git a/sound/soc/jz4740/Kconfig b/sound/soc/jz4740/Kconfig
new file mode 100644
index 0000000000..dd3b4507fb
--- /dev/null
+++ b/sound/soc/jz4740/Kconfig
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config SND_JZ4740_SOC_I2S
+	tristate "SoC Audio (I2S protocol) for Ingenic JZ4740 SoC"
+	depends on MIPS || COMPILE_TEST
+	depends on HAS_IOMEM
+	select REGMAP_MMIO
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	help
+	  Say Y if you want to use I2S protocol and I2S codec on Ingenic JZ4740
+	  based boards.
diff --git a/sound/soc/jz4740/Makefile b/sound/soc/jz4740/Makefile
new file mode 100644
index 0000000000..f8701c9b09
--- /dev/null
+++ b/sound/soc/jz4740/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Jz4740 Platform Support
+#
+snd-soc-jz4740-i2s-objs := jz4740-i2s.o
+
+obj-$(CONFIG_SND_JZ4740_SOC_I2S) += snd-soc-jz4740-i2s.o
diff --git a/sound/soc/jz4740/jz4740-i2s.c b/sound/soc/jz4740/jz4740-i2s.c
new file mode 100644
index 0000000000..5176195316
--- /dev/null
+++ b/sound/soc/jz4740/jz4740-i2s.c
@@ -0,0 +1,603 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/dmaengine_pcm.h>
+
+#define JZ_REG_AIC_CONF		0x00
+#define JZ_REG_AIC_CTRL		0x04
+#define JZ_REG_AIC_I2S_FMT	0x10
+#define JZ_REG_AIC_FIFO_STATUS	0x14
+#define JZ_REG_AIC_I2S_STATUS	0x1c
+#define JZ_REG_AIC_CLK_DIV	0x30
+#define JZ_REG_AIC_FIFO		0x34
+
+#define JZ_AIC_CONF_OVERFLOW_PLAY_LAST	BIT(6)
+#define JZ_AIC_CONF_INTERNAL_CODEC	BIT(5)
+#define JZ_AIC_CONF_I2S			BIT(4)
+#define JZ_AIC_CONF_RESET		BIT(3)
+#define JZ_AIC_CONF_BIT_CLK_MASTER	BIT(2)
+#define JZ_AIC_CONF_SYNC_CLK_MASTER	BIT(1)
+#define JZ_AIC_CONF_ENABLE		BIT(0)
+
+#define JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE	GENMASK(21, 19)
+#define JZ_AIC_CTRL_INPUT_SAMPLE_SIZE	GENMASK(18, 16)
+#define JZ_AIC_CTRL_ENABLE_RX_DMA	BIT(15)
+#define JZ_AIC_CTRL_ENABLE_TX_DMA	BIT(14)
+#define JZ_AIC_CTRL_MONO_TO_STEREO	BIT(11)
+#define JZ_AIC_CTRL_SWITCH_ENDIANNESS	BIT(10)
+#define JZ_AIC_CTRL_SIGNED_TO_UNSIGNED	BIT(9)
+#define JZ_AIC_CTRL_TFLUSH		BIT(8)
+#define JZ_AIC_CTRL_RFLUSH		BIT(7)
+#define JZ_AIC_CTRL_ENABLE_ROR_INT	BIT(6)
+#define JZ_AIC_CTRL_ENABLE_TUR_INT	BIT(5)
+#define JZ_AIC_CTRL_ENABLE_RFS_INT	BIT(4)
+#define JZ_AIC_CTRL_ENABLE_TFS_INT	BIT(3)
+#define JZ_AIC_CTRL_ENABLE_LOOPBACK	BIT(2)
+#define JZ_AIC_CTRL_ENABLE_PLAYBACK	BIT(1)
+#define JZ_AIC_CTRL_ENABLE_CAPTURE	BIT(0)
+
+#define JZ_AIC_I2S_FMT_DISABLE_BIT_CLK	BIT(12)
+#define JZ_AIC_I2S_FMT_DISABLE_BIT_ICLK	BIT(13)
+#define JZ_AIC_I2S_FMT_ENABLE_SYS_CLK	BIT(4)
+#define JZ_AIC_I2S_FMT_MSB		BIT(0)
+
+#define JZ_AIC_I2S_STATUS_BUSY		BIT(2)
+
+struct i2s_soc_info {
+	struct snd_soc_dai_driver *dai;
+
+	struct reg_field field_rx_fifo_thresh;
+	struct reg_field field_tx_fifo_thresh;
+	struct reg_field field_i2sdiv_capture;
+	struct reg_field field_i2sdiv_playback;
+
+	bool shared_fifo_flush;
+};
+
+struct jz4740_i2s {
+	struct regmap *regmap;
+
+	struct regmap_field *field_rx_fifo_thresh;
+	struct regmap_field *field_tx_fifo_thresh;
+	struct regmap_field *field_i2sdiv_capture;
+	struct regmap_field *field_i2sdiv_playback;
+
+	struct clk *clk_aic;
+	struct clk *clk_i2s;
+
+	struct snd_dmaengine_dai_dma_data playback_dma_data;
+	struct snd_dmaengine_dai_dma_data capture_dma_data;
+
+	const struct i2s_soc_info *soc_info;
+};
+
+static int jz4740_i2s_startup(struct snd_pcm_substream *substream,
+	struct snd_soc_dai *dai)
+{
+	struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	int ret;
+
+	/*
+	 * When we can flush FIFOs independently, only flush the FIFO
+	 * that is starting up. We can do this when the DAI is active
+	 * because it does not disturb other active substreams.
+	 */
+	if (!i2s->soc_info->shared_fifo_flush) {
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			regmap_set_bits(i2s->regmap, JZ_REG_AIC_CTRL, JZ_AIC_CTRL_TFLUSH);
+		else
+			regmap_set_bits(i2s->regmap, JZ_REG_AIC_CTRL, JZ_AIC_CTRL_RFLUSH);
+	}
+
+	if (snd_soc_dai_active(dai))
+		return 0;
+
+	/*
+	 * When there is a shared flush bit for both FIFOs, the TFLUSH
+	 * bit flushes both FIFOs. Flushing while the DAI is active would
+	 * cause FIFO underruns in other active substreams so we have to
+	 * guard this behind the snd_soc_dai_active() check.
+	 */
+	if (i2s->soc_info->shared_fifo_flush)
+		regmap_set_bits(i2s->regmap, JZ_REG_AIC_CTRL, JZ_AIC_CTRL_TFLUSH);
+
+	ret = clk_prepare_enable(i2s->clk_i2s);
+	if (ret)
+		return ret;
+
+	regmap_set_bits(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_ENABLE);
+	return 0;
+}
+
+static void jz4740_i2s_shutdown(struct snd_pcm_substream *substream,
+	struct snd_soc_dai *dai)
+{
+	struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+	if (snd_soc_dai_active(dai))
+		return;
+
+	regmap_clear_bits(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_ENABLE);
+
+	clk_disable_unprepare(i2s->clk_i2s);
+}
+
+static int jz4740_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
+	struct snd_soc_dai *dai)
+{
+	struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	uint32_t mask;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		mask = JZ_AIC_CTRL_ENABLE_PLAYBACK | JZ_AIC_CTRL_ENABLE_TX_DMA;
+	else
+		mask = JZ_AIC_CTRL_ENABLE_CAPTURE | JZ_AIC_CTRL_ENABLE_RX_DMA;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		regmap_set_bits(i2s->regmap, JZ_REG_AIC_CTRL, mask);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		regmap_clear_bits(i2s->regmap, JZ_REG_AIC_CTRL, mask);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int jz4740_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	const unsigned int conf_mask = JZ_AIC_CONF_BIT_CLK_MASTER |
+				       JZ_AIC_CONF_SYNC_CLK_MASTER;
+	unsigned int conf = 0, format = 0;
+
+	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+	case SND_SOC_DAIFMT_BP_FP:
+		conf |= JZ_AIC_CONF_BIT_CLK_MASTER | JZ_AIC_CONF_SYNC_CLK_MASTER;
+		format |= JZ_AIC_I2S_FMT_ENABLE_SYS_CLK;
+		break;
+	case SND_SOC_DAIFMT_BC_FP:
+		conf |= JZ_AIC_CONF_SYNC_CLK_MASTER;
+		break;
+	case SND_SOC_DAIFMT_BP_FC:
+		conf |= JZ_AIC_CONF_BIT_CLK_MASTER;
+		break;
+	case SND_SOC_DAIFMT_BC_FC:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_MSB:
+		format |= JZ_AIC_I2S_FMT_MSB;
+		break;
+	case SND_SOC_DAIFMT_I2S:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	regmap_update_bits(i2s->regmap, JZ_REG_AIC_CONF, conf_mask, conf);
+	regmap_write(i2s->regmap, JZ_REG_AIC_I2S_FMT, format);
+
+	return 0;
+}
+
+static int jz4740_i2s_get_i2sdiv(unsigned long mclk, unsigned long rate,
+				 unsigned long i2sdiv_max)
+{
+	unsigned long div, rate1, rate2, err1, err2;
+
+	div = mclk / (64 * rate);
+	if (div == 0)
+		div = 1;
+
+	rate1 = mclk / (64 * div);
+	rate2 = mclk / (64 * (div + 1));
+
+	err1 = abs(rate1 - rate);
+	err2 = abs(rate2 - rate);
+
+	/*
+	 * Choose the divider that produces the smallest error in the
+	 * output rate and reject dividers with a 5% or higher error.
+	 * In the event that both dividers are outside the acceptable
+	 * error margin, reject the rate to prevent distorted audio.
+	 * (The number 5% is arbitrary.)
+	 */
+	if (div <= i2sdiv_max && err1 <= err2 && err1 < rate/20)
+		return div;
+	if (div < i2sdiv_max && err2 < rate/20)
+		return div + 1;
+
+	return -EINVAL;
+}
+
+static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+	struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	struct regmap_field *div_field;
+	unsigned long i2sdiv_max;
+	unsigned int sample_size;
+	uint32_t ctrl, conf;
+	int div = 1;
+
+	regmap_read(i2s->regmap, JZ_REG_AIC_CTRL, &ctrl);
+	regmap_read(i2s->regmap, JZ_REG_AIC_CONF, &conf);
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S8:
+		sample_size = 0;
+		break;
+	case SNDRV_PCM_FORMAT_S16_LE:
+		sample_size = 1;
+		break;
+	case SNDRV_PCM_FORMAT_S20_LE:
+		sample_size = 3;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		sample_size = 4;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		ctrl &= ~JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE;
+		ctrl |= FIELD_PREP(JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE, sample_size);
+
+		if (params_channels(params) == 1)
+			ctrl |= JZ_AIC_CTRL_MONO_TO_STEREO;
+		else
+			ctrl &= ~JZ_AIC_CTRL_MONO_TO_STEREO;
+
+		div_field = i2s->field_i2sdiv_playback;
+		i2sdiv_max = GENMASK(i2s->soc_info->field_i2sdiv_playback.msb,
+				     i2s->soc_info->field_i2sdiv_playback.lsb);
+	} else {
+		ctrl &= ~JZ_AIC_CTRL_INPUT_SAMPLE_SIZE;
+		ctrl |= FIELD_PREP(JZ_AIC_CTRL_INPUT_SAMPLE_SIZE, sample_size);
+
+		div_field = i2s->field_i2sdiv_capture;
+		i2sdiv_max = GENMASK(i2s->soc_info->field_i2sdiv_capture.msb,
+				     i2s->soc_info->field_i2sdiv_capture.lsb);
+	}
+
+	/*
+	 * Only calculate I2SDIV if we're supplying the bit or frame clock.
+	 * If the codec is supplying both clocks then the divider output is
+	 * unused, and we don't want it to limit the allowed sample rates.
+	 */
+	if (conf & (JZ_AIC_CONF_BIT_CLK_MASTER | JZ_AIC_CONF_SYNC_CLK_MASTER)) {
+		div = jz4740_i2s_get_i2sdiv(clk_get_rate(i2s->clk_i2s),
+					    params_rate(params), i2sdiv_max);
+		if (div < 0)
+			return div;
+	}
+
+	regmap_write(i2s->regmap, JZ_REG_AIC_CTRL, ctrl);
+	regmap_field_write(div_field, div - 1);
+
+	return 0;
+}
+
+static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai)
+{
+	struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+	snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data,
+		&i2s->capture_dma_data);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops jz4740_i2s_dai_ops = {
+	.probe = jz4740_i2s_dai_probe,
+	.startup = jz4740_i2s_startup,
+	.shutdown = jz4740_i2s_shutdown,
+	.trigger = jz4740_i2s_trigger,
+	.hw_params = jz4740_i2s_hw_params,
+	.set_fmt = jz4740_i2s_set_fmt,
+};
+
+#define JZ4740_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
+			 SNDRV_PCM_FMTBIT_S16_LE | \
+			 SNDRV_PCM_FMTBIT_S20_LE | \
+			 SNDRV_PCM_FMTBIT_S24_LE)
+
+static struct snd_soc_dai_driver jz4740_i2s_dai = {
+	.playback = {
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_CONTINUOUS,
+		.formats = JZ4740_I2S_FMTS,
+	},
+	.capture = {
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_CONTINUOUS,
+		.formats = JZ4740_I2S_FMTS,
+	},
+	.symmetric_rate = 1,
+	.ops = &jz4740_i2s_dai_ops,
+};
+
+static const struct i2s_soc_info jz4740_i2s_soc_info = {
+	.dai			= &jz4740_i2s_dai,
+	.field_rx_fifo_thresh	= REG_FIELD(JZ_REG_AIC_CONF, 12, 15),
+	.field_tx_fifo_thresh	= REG_FIELD(JZ_REG_AIC_CONF, 8, 11),
+	.field_i2sdiv_capture	= REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
+	.field_i2sdiv_playback	= REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
+	.shared_fifo_flush	= true,
+};
+
+static const struct i2s_soc_info jz4760_i2s_soc_info = {
+	.dai			= &jz4740_i2s_dai,
+	.field_rx_fifo_thresh	= REG_FIELD(JZ_REG_AIC_CONF, 24, 27),
+	.field_tx_fifo_thresh	= REG_FIELD(JZ_REG_AIC_CONF, 16, 20),
+	.field_i2sdiv_capture	= REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
+	.field_i2sdiv_playback	= REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
+};
+
+static const struct i2s_soc_info x1000_i2s_soc_info = {
+	.dai = &jz4740_i2s_dai,
+	.field_rx_fifo_thresh	= REG_FIELD(JZ_REG_AIC_CONF, 24, 27),
+	.field_tx_fifo_thresh	= REG_FIELD(JZ_REG_AIC_CONF, 16, 20),
+	.field_i2sdiv_capture	= REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 8),
+	.field_i2sdiv_playback	= REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 8),
+};
+
+static struct snd_soc_dai_driver jz4770_i2s_dai = {
+	.playback = {
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_CONTINUOUS,
+		.formats = JZ4740_I2S_FMTS,
+	},
+	.capture = {
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_CONTINUOUS,
+		.formats = JZ4740_I2S_FMTS,
+	},
+	.ops = &jz4740_i2s_dai_ops,
+};
+
+static const struct i2s_soc_info jz4770_i2s_soc_info = {
+	.dai			= &jz4770_i2s_dai,
+	.field_rx_fifo_thresh	= REG_FIELD(JZ_REG_AIC_CONF, 24, 27),
+	.field_tx_fifo_thresh	= REG_FIELD(JZ_REG_AIC_CONF, 16, 20),
+	.field_i2sdiv_capture	= REG_FIELD(JZ_REG_AIC_CLK_DIV, 8, 11),
+	.field_i2sdiv_playback	= REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
+};
+
+static const struct i2s_soc_info jz4780_i2s_soc_info = {
+	.dai			= &jz4770_i2s_dai,
+	.field_rx_fifo_thresh	= REG_FIELD(JZ_REG_AIC_CONF, 24, 27),
+	.field_tx_fifo_thresh	= REG_FIELD(JZ_REG_AIC_CONF, 16, 20),
+	.field_i2sdiv_capture	= REG_FIELD(JZ_REG_AIC_CLK_DIV, 8, 11),
+	.field_i2sdiv_playback	= REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
+};
+
+static int jz4740_i2s_suspend(struct snd_soc_component *component)
+{
+	struct jz4740_i2s *i2s = snd_soc_component_get_drvdata(component);
+
+	if (snd_soc_component_active(component)) {
+		regmap_clear_bits(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_ENABLE);
+		clk_disable_unprepare(i2s->clk_i2s);
+	}
+
+	clk_disable_unprepare(i2s->clk_aic);
+
+	return 0;
+}
+
+static int jz4740_i2s_resume(struct snd_soc_component *component)
+{
+	struct jz4740_i2s *i2s = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	ret = clk_prepare_enable(i2s->clk_aic);
+	if (ret)
+		return ret;
+
+	if (snd_soc_component_active(component)) {
+		ret = clk_prepare_enable(i2s->clk_i2s);
+		if (ret) {
+			clk_disable_unprepare(i2s->clk_aic);
+			return ret;
+		}
+
+		regmap_set_bits(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_ENABLE);
+	}
+
+	return 0;
+}
+
+static int jz4740_i2s_probe(struct snd_soc_component *component)
+{
+	struct jz4740_i2s *i2s = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	ret = clk_prepare_enable(i2s->clk_aic);
+	if (ret)
+		return ret;
+
+	regmap_write(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_RESET);
+
+	regmap_write(i2s->regmap, JZ_REG_AIC_CONF,
+		     JZ_AIC_CONF_OVERFLOW_PLAY_LAST |
+		     JZ_AIC_CONF_I2S | JZ_AIC_CONF_INTERNAL_CODEC);
+
+	regmap_field_write(i2s->field_rx_fifo_thresh, 7);
+	regmap_field_write(i2s->field_tx_fifo_thresh, 8);
+
+	return 0;
+}
+
+static void jz4740_i2s_remove(struct snd_soc_component *component)
+{
+	struct jz4740_i2s *i2s = snd_soc_component_get_drvdata(component);
+
+	clk_disable_unprepare(i2s->clk_aic);
+}
+
+static const struct snd_soc_component_driver jz4740_i2s_component = {
+	.name			= "jz4740-i2s",
+	.probe			= jz4740_i2s_probe,
+	.remove			= jz4740_i2s_remove,
+	.suspend		= jz4740_i2s_suspend,
+	.resume			= jz4740_i2s_resume,
+	.legacy_dai_naming	= 1,
+};
+
+static const struct of_device_id jz4740_of_matches[] = {
+	{ .compatible = "ingenic,jz4740-i2s", .data = &jz4740_i2s_soc_info },
+	{ .compatible = "ingenic,jz4760-i2s", .data = &jz4760_i2s_soc_info },
+	{ .compatible = "ingenic,jz4770-i2s", .data = &jz4770_i2s_soc_info },
+	{ .compatible = "ingenic,jz4780-i2s", .data = &jz4780_i2s_soc_info },
+	{ .compatible = "ingenic,x1000-i2s", .data = &x1000_i2s_soc_info },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jz4740_of_matches);
+
+static int jz4740_i2s_init_regmap_fields(struct device *dev,
+					 struct jz4740_i2s *i2s)
+{
+	i2s->field_rx_fifo_thresh =
+		devm_regmap_field_alloc(dev, i2s->regmap,
+					i2s->soc_info->field_rx_fifo_thresh);
+	if (IS_ERR(i2s->field_rx_fifo_thresh))
+		return PTR_ERR(i2s->field_rx_fifo_thresh);
+
+	i2s->field_tx_fifo_thresh =
+		devm_regmap_field_alloc(dev, i2s->regmap,
+					i2s->soc_info->field_tx_fifo_thresh);
+	if (IS_ERR(i2s->field_tx_fifo_thresh))
+		return PTR_ERR(i2s->field_tx_fifo_thresh);
+
+	i2s->field_i2sdiv_capture =
+		devm_regmap_field_alloc(dev, i2s->regmap,
+					i2s->soc_info->field_i2sdiv_capture);
+	if (IS_ERR(i2s->field_i2sdiv_capture))
+		return PTR_ERR(i2s->field_i2sdiv_capture);
+
+	i2s->field_i2sdiv_playback =
+		devm_regmap_field_alloc(dev, i2s->regmap,
+					i2s->soc_info->field_i2sdiv_playback);
+	if (IS_ERR(i2s->field_i2sdiv_playback))
+		return PTR_ERR(i2s->field_i2sdiv_playback);
+
+	return 0;
+}
+
+static const struct regmap_config jz4740_i2s_regmap_config = {
+	.reg_bits	= 32,
+	.reg_stride	= 4,
+	.val_bits	= 32,
+	.max_register	= JZ_REG_AIC_FIFO,
+};
+
+static int jz4740_i2s_dev_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct jz4740_i2s *i2s;
+	struct resource *mem;
+	void __iomem *regs;
+	int ret;
+
+	i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);
+	if (!i2s)
+		return -ENOMEM;
+
+	i2s->soc_info = device_get_match_data(dev);
+
+	regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+
+	i2s->playback_dma_data.maxburst = 16;
+	i2s->playback_dma_data.addr = mem->start + JZ_REG_AIC_FIFO;
+
+	i2s->capture_dma_data.maxburst = 16;
+	i2s->capture_dma_data.addr = mem->start + JZ_REG_AIC_FIFO;
+
+	i2s->clk_aic = devm_clk_get(dev, "aic");
+	if (IS_ERR(i2s->clk_aic))
+		return PTR_ERR(i2s->clk_aic);
+
+	i2s->clk_i2s = devm_clk_get(dev, "i2s");
+	if (IS_ERR(i2s->clk_i2s))
+		return PTR_ERR(i2s->clk_i2s);
+
+	i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
+					    &jz4740_i2s_regmap_config);
+	if (IS_ERR(i2s->regmap))
+		return PTR_ERR(i2s->regmap);
+
+	ret = jz4740_i2s_init_regmap_fields(dev, i2s);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, i2s);
+
+	ret = devm_snd_soc_register_component(dev, &jz4740_i2s_component,
+					      i2s->soc_info->dai, 1);
+	if (ret)
+		return ret;
+
+	return devm_snd_dmaengine_pcm_register(dev, NULL,
+		SND_DMAENGINE_PCM_FLAG_COMPAT);
+}
+
+static struct platform_driver jz4740_i2s_driver = {
+	.probe = jz4740_i2s_dev_probe,
+	.driver = {
+		.name = "jz4740-i2s",
+		.of_match_table = jz4740_of_matches,
+	},
+};
+
+module_platform_driver(jz4740_i2s_driver);
+
+MODULE_AUTHOR("Lars-Peter Clausen, <lars@metafoo.de>");
+MODULE_DESCRIPTION("Ingenic JZ4740 SoC I2S driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:jz4740-i2s");