1 files changed, 383 insertions, 0 deletions
diff --git a/sound/soc/codecs/max98504.c b/sound/soc/codecs/max98504.c
new file mode 100644
index 000000000000..a7320e709890
--- /dev/null
+++ b/sound/soc/codecs/max98504.c
@@ -0,0 +1,383 @@
+/*
+ * MAX98504 ALSA SoC Audio driver
+ *
+ * Copyright 2013 - 2014 Maxim Integrated Products
+ * Copyright 2016 Samsung Electronics Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <sound/soc.h>
+
+#include "max98504.h"
+
+static const char * const max98504_supply_names[] = {
+	"DVDD",
+	"DIOVDD",
+	"PVDD",
+};
+#define MAX98504_NUM_SUPPLIES ARRAY_SIZE(max98504_supply_names)
+
+struct max98504_priv {
+	struct regmap *regmap;
+	struct regulator_bulk_data supplies[MAX98504_NUM_SUPPLIES];
+	unsigned int pcm_rx_channels;
+	bool brownout_enable;
+	unsigned int brownout_threshold;
+	unsigned int brownout_attenuation;
+	unsigned int brownout_attack_hold;
+	unsigned int brownout_timed_hold;
+	unsigned int brownout_release_rate;
+};
+
+static struct reg_default max98504_reg_defaults[] = {
+	{ 0x01,	0},
+	{ 0x02,	0},
+	{ 0x03,	0},
+	{ 0x04,	0},
+	{ 0x10, 0},
+	{ 0x11, 0},
+	{ 0x12, 0},
+	{ 0x13, 0},
+	{ 0x14, 0},
+	{ 0x15, 0},
+	{ 0x16, 0},
+	{ 0x17, 0},
+	{ 0x18, 0},
+	{ 0x19, 0},
+	{ 0x1A, 0},
+	{ 0x20, 0},
+	{ 0x21, 0},
+	{ 0x22, 0},
+	{ 0x23, 0},
+	{ 0x24, 0},
+	{ 0x25, 0},
+	{ 0x26, 0},
+	{ 0x27, 0},
+	{ 0x28, 0},
+	{ 0x30, 0},
+	{ 0x31, 0},
+	{ 0x32, 0},
+	{ 0x33, 0},
+	{ 0x34, 0},
+	{ 0x35, 0},
+	{ 0x36, 0},
+	{ 0x37, 0},
+	{ 0x38, 0},
+	{ 0x39, 0},
+	{ 0x40, 0},
+	{ 0x41, 0},
+};
+
+static bool max98504_volatile_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case MAX98504_INTERRUPT_STATUS:
+	case MAX98504_INTERRUPT_FLAGS:
+	case MAX98504_INTERRUPT_FLAG_CLEARS:
+	case MAX98504_WATCHDOG_CLEAR:
+	case MAX98504_GLOBAL_ENABLE:
+	case MAX98504_SOFTWARE_RESET:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool max98504_readable_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case MAX98504_SOFTWARE_RESET:
+	case MAX98504_WATCHDOG_CLEAR:
+	case MAX98504_INTERRUPT_FLAG_CLEARS:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static int max98504_pcm_rx_ev(struct snd_soc_dapm_widget *w,
+			      struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
+	struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE,
+			     max98504->pcm_rx_channels);
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE, 0);
+		break;
+	}
+
+	return 0;
+}
+
+static int max98504_component_probe(struct snd_soc_component *c)
+{
+	struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
+	struct regmap *map = max98504->regmap;
+	int ret;
+
+	ret = regulator_bulk_enable(MAX98504_NUM_SUPPLIES, max98504->supplies);
+	if (ret < 0)
+		return ret;
+
+	regmap_write(map, MAX98504_SOFTWARE_RESET, 0x1);
+	msleep(20);
+
+	if (!max98504->brownout_enable)
+		return 0;
+
+	regmap_write(map, MAX98504_PVDD_BROWNOUT_ENABLE, 0x1);
+
+	regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_1,
+		     (max98504->brownout_threshold & 0x1f) << 3 |
+		     (max98504->brownout_attenuation & 0x3));
+
+	regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_2,
+		     max98504->brownout_attack_hold & 0xff);
+
+	regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_3,
+		     max98504->brownout_timed_hold & 0xff);
+
+	regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_4,
+		     max98504->brownout_release_rate & 0xff);
+
+	return 0;
+}
+
+static void max98504_component_remove(struct snd_soc_component *c)
+{
+	struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
+
+	regulator_bulk_disable(MAX98504_NUM_SUPPLIES, max98504->supplies);
+}
+
+static const char *spk_source_mux_text[] = {
+	"PCM Monomix", "Analog In", "PDM Left", "PDM Right"
+};
+
+static const struct soc_enum spk_source_mux_enum =
+	SOC_ENUM_SINGLE(MAX98504_SPEAKER_SOURCE_SELECT,
+			0, ARRAY_SIZE(spk_source_mux_text),
+			spk_source_mux_text);
+
+static const struct snd_kcontrol_new spk_source_mux =
+	SOC_DAPM_ENUM("SPK Source", spk_source_mux_enum);
+
+static const struct snd_soc_dapm_route max98504_dapm_routes[] = {
+	{ "SPKOUT", NULL, "Global Enable" },
+	{ "SPK Source", "PCM Monomix", "DAC PCM" },
+	{ "SPK Source", "Analog In", "AIN" },
+	{ "SPK Source", "PDM Left", "DAC PDM" },
+	{ "SPK Source", "PDM Right", "DAC PDM" },
+};
+
+static const struct snd_soc_dapm_widget max98504_dapm_widgets[] = {
+	SND_SOC_DAPM_SUPPLY("Global Enable", MAX98504_GLOBAL_ENABLE,
+		0, 0, NULL, 0),
+	SND_SOC_DAPM_INPUT("AIN"),
+	SND_SOC_DAPM_AIF_OUT("AIF2OUTL", "AIF2 Capture", 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("AIF2OUTR", "AIF2 Capture", 1, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_DAC_E("DAC PCM", NULL, SND_SOC_NOPM, 0, 0,
+		max98504_pcm_rx_ev,
+		SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+	SND_SOC_DAPM_DAC("DAC PDM", NULL, MAX98504_PDM_RX_ENABLE, 0, 0),
+	SND_SOC_DAPM_MUX("SPK Source", SND_SOC_NOPM, 0, 0, &spk_source_mux),
+	SND_SOC_DAPM_REG(snd_soc_dapm_spk, "SPKOUT",
+		MAX98504_SPEAKER_ENABLE, 0, 1, 1, 0),
+};
+
+static int max98504_set_tdm_slot(struct snd_soc_dai *dai,
+		unsigned int tx_mask, unsigned int rx_mask,
+		int slots, int slot_width)
+{
+	struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
+	struct regmap *map = max98504->regmap;
+
+
+	switch (dai->id) {
+	case MAX98504_DAI_ID_PCM:
+		regmap_write(map, MAX98504_PCM_TX_ENABLE, tx_mask);
+		max98504->pcm_rx_channels = rx_mask;
+		break;
+
+	case MAX98504_DAI_ID_PDM:
+		regmap_write(map, MAX98504_PDM_TX_ENABLE, tx_mask);
+		break;
+	default:
+		WARN_ON(1);
+	}
+
+	return 0;
+}
+static int max98504_set_channel_map(struct snd_soc_dai *dai,
+		unsigned int tx_num, unsigned int *tx_slot,
+		unsigned int rx_num, unsigned int *rx_slot)
+{
+	struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
+	struct regmap *map = max98504->regmap;
+	unsigned int i, sources = 0;
+
+	for (i = 0; i < tx_num; i++)
+		if (tx_slot[i])
+			sources |= (1 << i);
+
+	switch (dai->id) {
+	case MAX98504_DAI_ID_PCM:
+		regmap_write(map, MAX98504_PCM_TX_CHANNEL_SOURCES,
+			     sources);
+		break;
+
+	case MAX98504_DAI_ID_PDM:
+		regmap_write(map, MAX98504_PDM_TX_CONTROL, sources);
+		break;
+	default:
+		WARN_ON(1);
+	}
+
+	regmap_write(map, MAX98504_MEASUREMENT_ENABLE, sources ? 0x3 : 0x01);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops max98504_dai_ops = {
+	.set_tdm_slot		= max98504_set_tdm_slot,
+	.set_channel_map	= max98504_set_channel_map,
+};
+
+#define MAX98504_FORMATS	(SNDRV_PCM_FMTBIT_S8|SNDRV_PCM_FMTBIT_S16_LE|\
+				SNDRV_PCM_FMTBIT_S24_LE|SNDRV_PCM_FMTBIT_S32_LE)
+#define MAX98504_PDM_RATES	(SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|\
+				SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100|\
+				SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_88200|\
+				SNDRV_PCM_RATE_96000)
+
+static struct snd_soc_dai_driver max98504_dai[] = {
+	/* TODO: Add the PCM interface definitions */
+	{
+		.name = "max98504-aif2",
+		.id = MAX98504_DAI_ID_PDM,
+		.playback = {
+			.stream_name	= "AIF2 Playback",
+			.channels_min	= 1,
+			.channels_max	= 2,
+			.rates		= MAX98504_PDM_RATES,
+			.formats	= MAX98504_FORMATS,
+		},
+		.capture = {
+			.stream_name	= "AIF2 Capture",
+			.channels_min	= 1,
+			.channels_max	= 2,
+			.rates		= MAX98504_PDM_RATES,
+			.formats	= MAX98504_FORMATS,
+		},
+		.ops = &max98504_dai_ops,
+	},
+};
+
+static const struct snd_soc_component_driver max98504_component_driver = {
+	.probe			= max98504_component_probe,
+	.remove			= max98504_component_remove,
+	.dapm_widgets		= max98504_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(max98504_dapm_widgets),
+	.dapm_routes		= max98504_dapm_routes,
+	.num_dapm_routes	= ARRAY_SIZE(max98504_dapm_routes),
+};
+
+static const struct regmap_config max98504_regmap = {
+	.reg_bits		= 16,
+	.val_bits		= 8,
+	.max_register		= MAX98504_MAX_REGISTER,
+	.reg_defaults		= max98504_reg_defaults,
+	.num_reg_defaults	= ARRAY_SIZE(max98504_reg_defaults),
+	.volatile_reg		= max98504_volatile_register,
+	.readable_reg		= max98504_readable_register,
+	.cache_type		= REGCACHE_RBTREE,
+};
+
+static int max98504_i2c_probe(struct i2c_client *client,
+			      const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct device_node *node = dev->of_node;
+	struct max98504_priv *max98504;
+	int i, ret;
+
+	max98504 = devm_kzalloc(dev, sizeof(*max98504), GFP_KERNEL);
+	if (!max98504)
+		return -ENOMEM;
+
+	if (node) {
+		if (!of_property_read_u32(node, "maxim,brownout-threshold",
+					&max98504->brownout_threshold))
+			max98504->brownout_enable = true;
+
+		of_property_read_u32(node, "maxim,brownout-attenuation",
+					&max98504->brownout_attenuation);
+		of_property_read_u32(node, "maxim,brownout-attack-hold-ms",
+					&max98504->brownout_attack_hold);
+		of_property_read_u32(node, "maxim,brownout-timed-hold-ms",
+					&max98504->brownout_timed_hold);
+		of_property_read_u32(node, "maxim,brownout-release-rate-ms",
+					&max98504->brownout_release_rate);
+	}
+
+	max98504->regmap = devm_regmap_init_i2c(client, &max98504_regmap);
+	if (IS_ERR(max98504->regmap)) {
+		ret = PTR_ERR(max98504->regmap);
+		dev_err(&client->dev, "regmap initialization failed: %d\n", ret);
+		return ret;
+	}
+
+	for (i = 0; i < MAX98504_NUM_SUPPLIES; i++)
+		max98504->supplies[i].supply = max98504_supply_names[i];
+
+	ret = devm_regulator_bulk_get(dev, MAX98504_NUM_SUPPLIES,
+				      max98504->supplies);
+	if (ret < 0)
+		return ret;
+
+	i2c_set_clientdata(client, max98504);
+
+	return devm_snd_soc_register_component(dev, &max98504_component_driver,
+				max98504_dai, ARRAY_SIZE(max98504_dai));
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id max98504_of_match[] = {
+	{ .compatible = "maxim,max98504" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, max98504_of_match);
+#endif
+
+static const struct i2c_device_id max98504_i2c_id[] = {
+	{ "max98504" },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, max98504_i2c_id);
+
+static struct i2c_driver max98504_i2c_driver = {
+	.driver = {
+		.name = "max98504",
+		.of_match_table = of_match_ptr(max98504_of_match),
+	},
+	.probe = max98504_i2c_probe,
+	.id_table = max98504_i2c_id,
+};
+module_i2c_driver(max98504_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC MAX98504 driver");
+MODULE_LICENSE("GPL");