ASoC: codecs: Add uda1334 codec driver

The UDA1334BTS supports the I2S-bus data format with word lengths of up
to 24 bits serial data format and has basic features such as de-emphasis
(at 44.1 kHz sampling rate) and mute.

Datasheet can be found at:
https://www.nxp.com/docs/en/data-sheet/UDA1334BTS.pdf

Cc: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Andra Danciu <andradanciu1997@gmail.com>
Link: https://lore.kernel.org/r/20190731111930.20230-3-andradanciu1997@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -199,6 +199,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_TS3A227E if I2C
 	select SND_SOC_TWL4030 if TWL4030_CORE
 	select SND_SOC_TWL6040 if TWL6040_CORE
+	select SND_SOC_UDA1334 if GPIOLIB
 	select SND_SOC_UDA134X
 	select SND_SOC_UDA1380 if I2C
 	select SND_SOC_WCD9335 if SLIMBUS
@@ -1207,6 +1208,14 @@ config SND_SOC_TWL4030
 config SND_SOC_TWL6040
 	tristate
 
+config SND_SOC_UDA1334
+	tristate "NXP UDA1334 DAC"
+	depends on GPIOLIB
+	help
+	  The UDA1334 is an NXP audio codec, supports the I2S-bus data format
+	  and has basic features such as de-emphasis (at 44.1 kHz sampling
+	  rate) and mute.
+
 config SND_SOC_UDA134X
        tristate
 

sound/soc/codecs/Makefile

@@ -212,6 +212,7 @@ snd-soc-tscs454-objs := tscs454.o
 snd-soc-ts3a227e-objs := ts3a227e.o
 snd-soc-twl4030-objs := twl4030.o
 snd-soc-twl6040-objs := twl6040.o
+snd-soc-uda1334-objs := uda1334.o
 snd-soc-uda134x-objs := uda134x.o
 snd-soc-uda1380-objs := uda1380.o
 snd-soc-wcd9335-objs := wcd-clsh-v2.o wcd9335.o
@@ -494,6 +495,7 @@ obj-$(CONFIG_SND_SOC_TSCS454)	+= snd-soc-tscs454.o
 obj-$(CONFIG_SND_SOC_TS3A227E)	+= snd-soc-ts3a227e.o
 obj-$(CONFIG_SND_SOC_TWL4030)	+= snd-soc-twl4030.o
 obj-$(CONFIG_SND_SOC_TWL6040)	+= snd-soc-twl6040.o
+obj-$(CONFIG_SND_SOC_UDA1334)	+= snd-soc-uda1334.o
 obj-$(CONFIG_SND_SOC_UDA134X)	+= snd-soc-uda134x.o
 obj-$(CONFIG_SND_SOC_UDA1380)	+= snd-soc-uda1380.o
 obj-$(CONFIG_SND_SOC_WCD9335)	+= snd-soc-wcd9335.o

sound/soc/codecs/uda1334.c

+// SPDX-License-Identifier: GPL-2.0-only
+//
+// uda1334.c  --  UDA1334 ALSA SoC Audio driver
+//
+// Based on WM8523 ALSA SoC Audio driver written by Mark Brown
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+
+#define UDA1334_NUM_RATES 6
+
+/* codec private data */
+struct uda1334_priv {
+	struct gpio_desc *mute;
+	struct gpio_desc *deemph;
+	unsigned int sysclk;
+	unsigned int rate_constraint_list[UDA1334_NUM_RATES];
+	struct snd_pcm_hw_constraint_list rate_constraint;
+};
+
+static const struct snd_soc_dapm_widget uda1334_dapm_widgets[] = {
+SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
+SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
+SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
+};
+
+static const struct snd_soc_dapm_route uda1334_dapm_routes[] = {
+	{ "LINEVOUTL", NULL, "DAC" },
+	{ "LINEVOUTR", NULL, "DAC" },
+};
+
+static int uda1334_put_deemph(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+	int deemph = ucontrol->value.integer.value[0];
+
+	if (deemph > 1)
+		return -EINVAL;
+
+	gpiod_set_value_cansleep(uda1334->deemph, deemph);
+
+	return 0;
+};
+
+static int uda1334_get_deemph(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	ret = gpiod_get_value_cansleep(uda1334->deemph);
+	if (ret < 0)
+		return -EINVAL;
+
+	ucontrol->value.integer.value[0] = ret;
+
+	return 0;
+};
+
+static const struct snd_kcontrol_new uda1334_snd_controls[] = {
+	SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
+			    uda1334_get_deemph, uda1334_put_deemph),
+};
+
+static const struct {
+	int value;
+	int ratio;
+} lrclk_ratios[UDA1334_NUM_RATES] = {
+	{ 1, 128 },
+	{ 2, 192 },
+	{ 3, 256 },
+	{ 4, 384 },
+	{ 5, 512 },
+	{ 6, 768 },
+};
+
+static int uda1334_startup(struct snd_pcm_substream *substream,
+			   struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+
+	/*
+	 * The set of sample rates that can be supported depends on the
+	 * MCLK supplied to the CODEC - enforce this.
+	 */
+	if (!uda1334->sysclk) {
+		dev_err(component->dev,
+			"No MCLK configured, call set_sysclk() on init\n");
+		return -EINVAL;
+	}
+
+	snd_pcm_hw_constraint_list(substream->runtime, 0,
+				   SNDRV_PCM_HW_PARAM_RATE,
+				   &uda1334->rate_constraint);
+
+	gpiod_set_value_cansleep(uda1334->mute, 1);
+
+	return 0;
+}
+
+static void uda1334_shutdown(struct snd_pcm_substream *substream,
+			     struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+
+	gpiod_set_value_cansleep(uda1334->mute, 0);
+}
+
+static int uda1334_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+				  int clk_id, unsigned int freq, int dir)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+	unsigned int val;
+	int i, j = 0;
+
+	uda1334->sysclk = freq;
+
+	uda1334->rate_constraint.count = 0;
+	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
+		val = freq / lrclk_ratios[i].ratio;
+		/*
+		 * Check that it's a standard rate since core can't
+		 * cope with others and having the odd rates confuses
+		 * constraint matching.
+		 */
+
+		switch (val) {
+		case 8000:
+		case 32000:
+		case 44100:
+		case 48000:
+		case 64000:
+		case 88200:
+		case 96000:
+			dev_dbg(component->dev, "Supported sample rate: %dHz\n",
+				val);
+			uda1334->rate_constraint_list[j++] = val;
+			uda1334->rate_constraint.count++;
+			break;
+		default:
+			dev_dbg(component->dev, "Skipping sample rate: %dHz\n",
+				val);
+		}
+	}
+
+	/* Need at least one supported rate... */
+	if (uda1334->rate_constraint.count == 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int uda1334_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
+{
+	fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
+		SND_SOC_DAIFMT_MASTER_MASK);
+
+	if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+		    SND_SOC_DAIFMT_CBS_CFS)) {
+		dev_err(codec_dai->dev, "Invalid DAI format\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int uda1334_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
+{
+	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(dai->component);
+
+	if (uda1334->mute)
+		gpiod_set_value_cansleep(uda1334->mute, mute);
+
+	return 0;
+}
+
+#define UDA1334_RATES SNDRV_PCM_RATE_8000_96000
+
+#define UDA1334_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
+
+static const struct snd_soc_dai_ops uda1334_dai_ops = {
+	.startup	= uda1334_startup,
+	.shutdown	= uda1334_shutdown,
+	.set_sysclk	= uda1334_set_dai_sysclk,
+	.set_fmt	= uda1334_set_fmt,
+	.mute_stream	= uda1334_mute_stream,
+};
+
+static struct snd_soc_dai_driver uda1334_dai = {
+	.name = "uda1334-hifi",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = UDA1334_RATES,
+		.formats = UDA1334_FORMATS,
+	},
+	.ops = &uda1334_dai_ops,
+};
+
+static int uda1334_probe(struct snd_soc_component *component)
+{
+	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+
+	uda1334->rate_constraint.list = &uda1334->rate_constraint_list[0];
+	uda1334->rate_constraint.count =
+		ARRAY_SIZE(uda1334->rate_constraint_list);
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver soc_component_dev_uda1334 = {
+	.probe			= uda1334_probe,
+	.controls		= uda1334_snd_controls,
+	.num_controls		= ARRAY_SIZE(uda1334_snd_controls),
+	.dapm_widgets		= uda1334_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(uda1334_dapm_widgets),
+	.dapm_routes		= uda1334_dapm_routes,
+	.num_dapm_routes	= ARRAY_SIZE(uda1334_dapm_routes),
+	.idle_bias_on		= 1,
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+	.non_legacy_dai_naming	= 1,
+};
+
+static const struct of_device_id uda1334_of_match[] = {
+	{ .compatible = "nxp,uda1334" },
+	{ /* sentinel*/ }
+};
+MODULE_DEVICE_TABLE(of, uda1334_of_match);
+
+static int uda1334_codec_probe(struct platform_device *pdev)
+{
+	struct uda1334_priv *uda1334;
+	int ret;
+
+	uda1334 = devm_kzalloc(&pdev->dev, sizeof(struct uda1334_priv),
+			       GFP_KERNEL);
+	if (!uda1334)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, uda1334);
+
+	uda1334->mute = devm_gpiod_get(&pdev->dev, "nxp,mute", GPIOD_OUT_LOW);
+	if (IS_ERR(uda1334->mute)) {
+		ret = PTR_ERR(uda1334->mute);
+		dev_err(&pdev->dev, "Failed to get mute line: %d\n", ret);
+		return ret;
+	}
+
+	uda1334->deemph = devm_gpiod_get(&pdev->dev, "nxp,deemph", GPIOD_OUT_LOW);
+	if (IS_ERR(uda1334->deemph)) {
+		ret = PTR_ERR(uda1334->deemph);
+		dev_err(&pdev->dev, "Failed to get deemph line: %d\n", ret);
+		return ret;
+	}
+
+	ret = devm_snd_soc_register_component(&pdev->dev,
+					      &soc_component_dev_uda1334,
+					      &uda1334_dai, 1);
+	if (ret < 0)
+		dev_err(&pdev->dev, "Failed to register component: %d\n", ret);
+
+	return ret;
+}
+
+static struct platform_driver uda1334_codec_driver = {
+	.probe		= uda1334_codec_probe,
+	.driver		= {
+		.name	= "uda1334-codec",
+		.of_match_table = uda1334_of_match,
+	},
+};
+module_platform_driver(uda1334_codec_driver);
+
+MODULE_DESCRIPTION("ASoC UDA1334 driver");
+MODULE_AUTHOR("Andra Danciu <andradanciu1997@gmail.com>");
+MODULE_ALIAS("platform:uda1334-codec");
+MODULE_LICENSE("GPL v2");