1 files changed, 430 insertions, 0 deletions
diff --git a/sound/soc/codecs/max98371.c b/sound/soc/codecs/max98371.c
new file mode 100644
index 000000000..bac9d1bcf
--- /dev/null
+++ b/sound/soc/codecs/max98371.c
@@ -0,0 +1,430 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * max98371.c -- ALSA SoC Stereo MAX98371 driver
+ *
+ * Copyright 2015-16 Maxim Integrated Products
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+#include "max98371.h"
+
+static const char *const monomix_text[] = {
+	"Left", "Right", "LeftRightDiv2",
+};
+
+static const char *const hpf_cutoff_txt[] = {
+	"Disable", "DC Block", "50Hz",
+	"100Hz", "200Hz", "400Hz", "800Hz",
+};
+
+static SOC_ENUM_SINGLE_DECL(max98371_monomix, MAX98371_MONOMIX_CFG, 0,
+		monomix_text);
+
+static SOC_ENUM_SINGLE_DECL(max98371_hpf_cutoff, MAX98371_HPF, 0,
+		hpf_cutoff_txt);
+
+static const DECLARE_TLV_DB_RANGE(max98371_dht_min_gain,
+	0, 1, TLV_DB_SCALE_ITEM(537, 66, 0),
+	2, 3, TLV_DB_SCALE_ITEM(677, 82, 0),
+	4, 5, TLV_DB_SCALE_ITEM(852, 104, 0),
+	6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0),
+	8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0),
+	10, 11, TLV_DB_SCALE_ITEM(1699, 101, 0),
+);
+
+static const DECLARE_TLV_DB_RANGE(max98371_dht_max_gain,
+	0, 1, TLV_DB_SCALE_ITEM(537, 66, 0),
+	2, 3, TLV_DB_SCALE_ITEM(677, 82, 0),
+	4, 5, TLV_DB_SCALE_ITEM(852, 104, 0),
+	6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0),
+	8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0),
+	10, 11, TLV_DB_SCALE_ITEM(1699, 208, 0),
+);
+
+static const DECLARE_TLV_DB_RANGE(max98371_dht_rot_gain,
+	0, 1, TLV_DB_SCALE_ITEM(-50, -50, 0),
+	2, 6, TLV_DB_SCALE_ITEM(-100, -100, 0),
+	7, 8, TLV_DB_SCALE_ITEM(-800, -200, 0),
+	9, 11, TLV_DB_SCALE_ITEM(-1200, -300, 0),
+	12, 13, TLV_DB_SCALE_ITEM(-2000, -200, 0),
+	14, 15, TLV_DB_SCALE_ITEM(-2500, -500, 0),
+);
+
+static const struct reg_default max98371_reg[] = {
+	{ 0x01, 0x00 },
+	{ 0x02, 0x00 },
+	{ 0x03, 0x00 },
+	{ 0x04, 0x00 },
+	{ 0x05, 0x00 },
+	{ 0x06, 0x00 },
+	{ 0x07, 0x00 },
+	{ 0x08, 0x00 },
+	{ 0x09, 0x00 },
+	{ 0x0A, 0x00 },
+	{ 0x10, 0x06 },
+	{ 0x11, 0x08 },
+	{ 0x14, 0x80 },
+	{ 0x15, 0x00 },
+	{ 0x16, 0x00 },
+	{ 0x18, 0x00 },
+	{ 0x19, 0x00 },
+	{ 0x1C, 0x00 },
+	{ 0x1D, 0x00 },
+	{ 0x1E, 0x00 },
+	{ 0x1F, 0x00 },
+	{ 0x20, 0x00 },
+	{ 0x21, 0x00 },
+	{ 0x22, 0x00 },
+	{ 0x23, 0x00 },
+	{ 0x24, 0x00 },
+	{ 0x25, 0x00 },
+	{ 0x26, 0x00 },
+	{ 0x27, 0x00 },
+	{ 0x28, 0x00 },
+	{ 0x29, 0x00 },
+	{ 0x2A, 0x00 },
+	{ 0x2B, 0x00 },
+	{ 0x2C, 0x00 },
+	{ 0x2D, 0x00 },
+	{ 0x2E, 0x0B },
+	{ 0x31, 0x00 },
+	{ 0x32, 0x18 },
+	{ 0x33, 0x00 },
+	{ 0x34, 0x00 },
+	{ 0x36, 0x00 },
+	{ 0x37, 0x00 },
+	{ 0x38, 0x00 },
+	{ 0x39, 0x00 },
+	{ 0x3A, 0x00 },
+	{ 0x3B, 0x00 },
+	{ 0x3C, 0x00 },
+	{ 0x3D, 0x00 },
+	{ 0x3E, 0x00 },
+	{ 0x3F, 0x00 },
+	{ 0x40, 0x00 },
+	{ 0x41, 0x00 },
+	{ 0x42, 0x00 },
+	{ 0x43, 0x00 },
+	{ 0x4A, 0x00 },
+	{ 0x4B, 0x00 },
+	{ 0x4C, 0x00 },
+	{ 0x4D, 0x00 },
+	{ 0x4E, 0x00 },
+	{ 0x50, 0x00 },
+	{ 0x51, 0x00 },
+	{ 0x55, 0x00 },
+	{ 0x58, 0x00 },
+	{ 0x59, 0x00 },
+	{ 0x5C, 0x00 },
+	{ 0xFF, 0x43 },
+};
+
+static bool max98371_volatile_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case MAX98371_IRQ_CLEAR1:
+	case MAX98371_IRQ_CLEAR2:
+	case MAX98371_IRQ_CLEAR3:
+	case MAX98371_VERSION:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool max98371_readable_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case MAX98371_SOFT_RESET:
+		return false;
+	default:
+		return true;
+	}
+};
+
+static const DECLARE_TLV_DB_RANGE(max98371_gain_tlv,
+	0, 7, TLV_DB_SCALE_ITEM(0, 50, 0),
+	8, 10, TLV_DB_SCALE_ITEM(400, 100, 0)
+);
+
+static const DECLARE_TLV_DB_SCALE(digital_tlv, -6300, 50, 1);
+
+static const struct snd_kcontrol_new max98371_snd_controls[] = {
+	SOC_SINGLE_TLV("Speaker Volume", MAX98371_GAIN,
+			MAX98371_GAIN_SHIFT, (1<<MAX98371_GAIN_WIDTH)-1, 0,
+			max98371_gain_tlv),
+	SOC_SINGLE_TLV("Digital Volume", MAX98371_DIGITAL_GAIN, 0,
+			(1<<MAX98371_DIGITAL_GAIN_WIDTH)-1, 1, digital_tlv),
+	SOC_SINGLE_TLV("Speaker DHT Max Volume", MAX98371_GAIN,
+			0, (1<<MAX98371_DHT_MAX_WIDTH)-1, 0,
+			max98371_dht_max_gain),
+	SOC_SINGLE_TLV("Speaker DHT Min Volume", MAX98371_DHT_GAIN,
+			0, (1<<MAX98371_DHT_GAIN_WIDTH)-1, 0,
+			max98371_dht_min_gain),
+	SOC_SINGLE_TLV("Speaker DHT Rotation Volume", MAX98371_DHT_GAIN,
+			0, (1<<MAX98371_DHT_ROT_WIDTH)-1, 0,
+			max98371_dht_rot_gain),
+	SOC_SINGLE("DHT Attack Step", MAX98371_DHT, MAX98371_DHT_STEP, 3, 0),
+	SOC_SINGLE("DHT Attack Rate", MAX98371_DHT, 0, 7, 0),
+	SOC_ENUM("Monomix Select", max98371_monomix),
+	SOC_ENUM("HPF Cutoff", max98371_hpf_cutoff),
+};
+
+static int max98371_dai_set_fmt(struct snd_soc_dai *codec_dai,
+		unsigned int fmt)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	struct max98371_priv *max98371 = snd_soc_component_get_drvdata(component);
+	unsigned int val = 0;
+
+	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+	case SND_SOC_DAIFMT_CBC_CFC:
+		break;
+	default:
+		dev_err(component->dev, "DAI clock mode unsupported");
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		val |= 0;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		val |= MAX98371_DAI_RIGHT;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		val |= MAX98371_DAI_LEFT;
+		break;
+	default:
+		dev_err(component->dev, "DAI wrong mode unsupported");
+		return -EINVAL;
+	}
+	regmap_update_bits(max98371->regmap, MAX98371_FMT,
+			MAX98371_FMT_MODE_MASK, val);
+	return 0;
+}
+
+static int max98371_dai_hw_params(struct snd_pcm_substream *substream,
+		struct snd_pcm_hw_params *params,
+		struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct max98371_priv *max98371 = snd_soc_component_get_drvdata(component);
+	int blr_clk_ratio, ch_size, channels = params_channels(params);
+	int rate = params_rate(params);
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S8:
+		regmap_update_bits(max98371->regmap, MAX98371_FMT,
+				MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
+		ch_size = 8;
+		break;
+	case SNDRV_PCM_FORMAT_S16_LE:
+		regmap_update_bits(max98371->regmap, MAX98371_FMT,
+				MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
+		ch_size = 16;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		regmap_update_bits(max98371->regmap, MAX98371_FMT,
+				MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
+		ch_size = 24;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		regmap_update_bits(max98371->regmap, MAX98371_FMT,
+				MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
+		ch_size = 32;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* BCLK/LRCLK ratio calculation */
+	blr_clk_ratio = channels * ch_size;
+	switch (blr_clk_ratio) {
+	case 32:
+		regmap_update_bits(max98371->regmap,
+			MAX98371_DAI_CLK,
+			MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_32);
+		break;
+	case 48:
+		regmap_update_bits(max98371->regmap,
+			MAX98371_DAI_CLK,
+			MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_48);
+		break;
+	case 64:
+		regmap_update_bits(max98371->regmap,
+			MAX98371_DAI_CLK,
+			MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_64);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (rate) {
+	case 32000:
+		regmap_update_bits(max98371->regmap,
+			MAX98371_SPK_SR,
+			MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_32);
+		break;
+	case 44100:
+		regmap_update_bits(max98371->regmap,
+			MAX98371_SPK_SR,
+			MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_44);
+		break;
+	case 48000:
+		regmap_update_bits(max98371->regmap,
+			MAX98371_SPK_SR,
+			MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_48);
+		break;
+	case 88200:
+		regmap_update_bits(max98371->regmap,
+			MAX98371_SPK_SR,
+			MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_88);
+		break;
+	case 96000:
+		regmap_update_bits(max98371->regmap,
+			MAX98371_SPK_SR,
+			MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_96);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* enabling both the RX channels*/
+	regmap_update_bits(max98371->regmap, MAX98371_MONOMIX_SRC,
+			MAX98371_MONOMIX_SRC_MASK, MONOMIX_RX_0_1);
+	regmap_update_bits(max98371->regmap, MAX98371_DAI_CHANNEL,
+			MAX98371_CHANNEL_MASK, MAX98371_CHANNEL_MASK);
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget max98371_dapm_widgets[] = {
+	SND_SOC_DAPM_DAC("DAC", NULL, MAX98371_SPK_ENABLE, 0, 0),
+	SND_SOC_DAPM_SUPPLY("Global Enable", MAX98371_GLOBAL_ENABLE,
+		0, 0, NULL, 0),
+	SND_SOC_DAPM_OUTPUT("SPK_OUT"),
+};
+
+static const struct snd_soc_dapm_route max98371_audio_map[] = {
+	{"DAC", NULL, "HiFi Playback"},
+	{"SPK_OUT", NULL, "DAC"},
+	{"SPK_OUT", NULL, "Global Enable"},
+};
+
+#define MAX98371_RATES SNDRV_PCM_RATE_8000_48000
+#define MAX98371_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \
+		SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
+
+static const struct snd_soc_dai_ops max98371_dai_ops = {
+	.set_fmt = max98371_dai_set_fmt,
+	.hw_params = max98371_dai_hw_params,
+};
+
+static struct snd_soc_dai_driver max98371_dai[] = {
+	{
+		.name = "max98371-aif1",
+		.playback = {
+			.stream_name = "HiFi Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = MAX98371_FORMATS,
+		},
+		.ops = &max98371_dai_ops,
+	}
+};
+
+static const struct snd_soc_component_driver max98371_component = {
+	.controls		= max98371_snd_controls,
+	.num_controls		= ARRAY_SIZE(max98371_snd_controls),
+	.dapm_routes		= max98371_audio_map,
+	.num_dapm_routes	= ARRAY_SIZE(max98371_audio_map),
+	.dapm_widgets		= max98371_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(max98371_dapm_widgets),
+	.idle_bias_on		= 1,
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+};
+
+static const struct regmap_config max98371_regmap = {
+	.reg_bits         = 8,
+	.val_bits         = 8,
+	.max_register     = MAX98371_VERSION,
+	.reg_defaults     = max98371_reg,
+	.num_reg_defaults = ARRAY_SIZE(max98371_reg),
+	.volatile_reg     = max98371_volatile_register,
+	.readable_reg     = max98371_readable_register,
+	.cache_type       = REGCACHE_RBTREE,
+};
+
+static int max98371_i2c_probe(struct i2c_client *i2c)
+{
+	struct max98371_priv *max98371;
+	int ret, reg;
+
+	max98371 = devm_kzalloc(&i2c->dev,
+			sizeof(*max98371), GFP_KERNEL);
+	if (!max98371)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, max98371);
+	max98371->regmap = devm_regmap_init_i2c(i2c, &max98371_regmap);
+	if (IS_ERR(max98371->regmap)) {
+		ret = PTR_ERR(max98371->regmap);
+		dev_err(&i2c->dev,
+				"Failed to allocate regmap: %d\n", ret);
+		return ret;
+	}
+
+	ret = regmap_read(max98371->regmap, MAX98371_VERSION, &reg);
+	if (ret < 0) {
+		dev_info(&i2c->dev, "device error %d\n", ret);
+		return ret;
+	}
+	dev_info(&i2c->dev, "device version %x\n", reg);
+
+	ret = devm_snd_soc_register_component(&i2c->dev, &max98371_component,
+			max98371_dai, ARRAY_SIZE(max98371_dai));
+	if (ret < 0) {
+		dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
+		return ret;
+	}
+	return ret;
+}
+
+static const struct i2c_device_id max98371_i2c_id[] = {
+	{ "max98371", 0 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(i2c, max98371_i2c_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id max98371_of_match[] = {
+	{ .compatible = "maxim,max98371", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, max98371_of_match);
+#endif
+
+static struct i2c_driver max98371_i2c_driver = {
+	.driver = {
+		.name = "max98371",
+		.of_match_table = of_match_ptr(max98371_of_match),
+	},
+	.probe_new  = max98371_i2c_probe,
+	.id_table = max98371_i2c_id,
+};
+
+module_i2c_driver(max98371_i2c_driver);
+
+MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
+MODULE_DESCRIPTION("ALSA SoC MAX98371 driver");
+MODULE_LICENSE("GPL");