[deliverable/linux.git] / sound / soc / codecs / tas2552.c

/*
 * tas2552.c - ALSA SoC Texas Instruments TAS2552 Mono Audio Amplifier
 *
 * Copyright (C) 2014 Texas Instruments Incorporated -  http://www.ti.com
 *
 * Author: Dan Murphy <dmurphy@ti.com>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/slab.h>

#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>

#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>
#include <sound/tas2552-plat.h>
#include <dt-bindings/sound/tas2552.h>

#include "tas2552.h"

static struct reg_default tas2552_reg_defs[] = {
	{TAS2552_CFG_1, 0x22},
	{TAS2552_CFG_3, 0x80},
	{TAS2552_DOUT, 0x00},
	{TAS2552_OUTPUT_DATA, 0xc0},
	{TAS2552_PDM_CFG, 0x01},
	{TAS2552_PGA_GAIN, 0x00},
	{TAS2552_BOOST_PT_CTRL, 0x0f},
	{TAS2552_RESERVED_0D, 0xbe},
	{TAS2552_LIMIT_RATE_HYS, 0x08},
	{TAS2552_CFG_2, 0xef},
	{TAS2552_SER_CTRL_1, 0x00},
	{TAS2552_SER_CTRL_2, 0x00},
	{TAS2552_PLL_CTRL_1, 0x10},
	{TAS2552_PLL_CTRL_2, 0x00},
	{TAS2552_PLL_CTRL_3, 0x00},
	{TAS2552_BTIP, 0x8f},
	{TAS2552_BTS_CTRL, 0x80},
	{TAS2552_LIMIT_RELEASE, 0x04},
	{TAS2552_LIMIT_INT_COUNT, 0x00},
	{TAS2552_EDGE_RATE_CTRL, 0x40},
	{TAS2552_VBAT_DATA, 0x00},
};

#define TAS2552_NUM_SUPPLIES	3
static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = {
	"vbat",		/* vbat voltage */
	"iovdd",	/* I/O Voltage */
	"avdd",		/* Analog DAC Voltage */
};

struct tas2552_data {
	struct snd_soc_codec *codec;
	struct regmap *regmap;
	struct i2c_client *tas2552_client;
	struct regulator_bulk_data supplies[TAS2552_NUM_SUPPLIES];
	struct gpio_desc *enable_gpio;
	unsigned char regs[TAS2552_VBAT_DATA];
	unsigned int pll_clkin;
	unsigned int pdm_clk;

	unsigned int dai_fmt;
	unsigned int tdm_delay;
};

static int tas2552_post_event(struct snd_soc_dapm_widget *w,
			      struct snd_kcontrol *kcontrol, int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);

	switch (event) {
	case SND_SOC_DAPM_POST_PMU:
		snd_soc_write(codec, TAS2552_RESERVED_0D, 0xc0);
		snd_soc_update_bits(codec, TAS2552_LIMIT_RATE_HYS, (1 << 5),
				    (1 << 5));
		snd_soc_update_bits(codec, TAS2552_CFG_2, 1, 0);
		snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_SWS, 0);
		break;
	case SND_SOC_DAPM_POST_PMD:
		snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_SWS,
				    TAS2552_SWS);
		snd_soc_update_bits(codec, TAS2552_CFG_2, 1, 1);
		snd_soc_update_bits(codec, TAS2552_LIMIT_RATE_HYS, (1 << 5), 0);
		snd_soc_write(codec, TAS2552_RESERVED_0D, 0xbe);
		break;
	}
	return 0;
}

/* Input mux controls */
static const char * const tas2552_input_texts[] = {
	"Digital", "Analog" };
static SOC_ENUM_SINGLE_DECL(tas2552_input_mux_enum, TAS2552_CFG_3, 7,
			    tas2552_input_texts);

static const struct snd_kcontrol_new tas2552_input_mux_control =
	SOC_DAPM_ENUM("Route", tas2552_input_mux_enum);

static const struct snd_soc_dapm_widget tas2552_dapm_widgets[] =
{
	SND_SOC_DAPM_INPUT("IN"),

	/* MUX Controls */
	SND_SOC_DAPM_MUX("Input selection", SND_SOC_NOPM, 0, 0,
			 &tas2552_input_mux_control),

	SND_SOC_DAPM_AIF_IN("DAC IN", "DAC Playback", 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_OUT_DRV("ClassD", TAS2552_CFG_2, 7, 0, NULL, 0),
	SND_SOC_DAPM_SUPPLY("PLL", TAS2552_CFG_2, 3, 0, NULL, 0),
	SND_SOC_DAPM_POST("Post Event", tas2552_post_event),

	SND_SOC_DAPM_OUTPUT("OUT")
};

static const struct snd_soc_dapm_route tas2552_audio_map[] = {
	{"DAC", NULL, "DAC IN"},
	{"Input selection", "Digital", "DAC"},
	{"Input selection", "Analog", "IN"},
	{"ClassD", NULL, "Input selection"},
	{"OUT", NULL, "ClassD"},
	{"ClassD", NULL, "PLL"},
};

#ifdef CONFIG_PM
static void tas2552_sw_shutdown(struct tas2552_data *tas_data, int sw_shutdown)
{
	u8 cfg1_reg = 0;

	if (!tas_data->codec)
		return;

	if (sw_shutdown)
		cfg1_reg = TAS2552_SWS;

	snd_soc_update_bits(tas_data->codec, TAS2552_CFG_1, TAS2552_SWS,
			    cfg1_reg);
}
#endif

static int tas2552_hw_params(struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params,
			     struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
	int sample_rate, pll_clk;
	int d;
	u8 p, j;

	if (!tas2552->pll_clkin)
		return -EINVAL;

	snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);

	if (tas2552->pll_clkin == TAS2552_245MHZ_CLK ||
	    tas2552->pll_clkin == TAS2552_225MHZ_CLK) {
		/* By pass the PLL configuration */
		snd_soc_update_bits(codec, TAS2552_PLL_CTRL_2,
				    TAS2552_PLL_BYPASS_MASK,
				    TAS2552_PLL_BYPASS);
	} else {
		/* Fill in the PLL control registers for J & D
		 * PLL_CLK = (.5 * freq * J.D) / 2^p
		 * Need to fill in J and D here based on incoming freq
		 */
		p = snd_soc_read(codec, TAS2552_PLL_CTRL_1);
		p = (p >> 7);
		sample_rate = params_rate(params);

		if (sample_rate == 48000)
			pll_clk = TAS2552_245MHZ_CLK;
		else if (sample_rate == 44100)
			pll_clk = TAS2552_225MHZ_CLK;
		else {
			dev_vdbg(codec->dev, "Substream sample rate is not found %i\n",
					params_rate(params));
			return -EINVAL;
		}

		j = (pll_clk * 2 * (1 << p)) / tas2552->pll_clkin;
		d = (pll_clk * 2 * (1 << p)) % tas2552->pll_clkin;

		snd_soc_update_bits(codec, TAS2552_PLL_CTRL_1,
				TAS2552_PLL_J_MASK, j);
		snd_soc_write(codec, TAS2552_PLL_CTRL_2,
					(d >> 7) & TAS2552_PLL_D_UPPER_MASK);
		snd_soc_write(codec, TAS2552_PLL_CTRL_3,
				d & TAS2552_PLL_D_LOWER_MASK);

	}

	return 0;
}

#define TAS2552_DAI_FMT_MASK	(TAS2552_BCLKDIR | \
				 TAS2552_WCLKDIR | \
				 TAS2552_DATAFORMAT_MASK)
static int tas2552_prepare(struct snd_pcm_substream *substream,
			   struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	int delay = 0;

	/* TDM slot selection only valid in DSP_A/_B mode */
	if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_A)
		delay += (tas2552->tdm_delay + 1);
	else if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_B)
		delay += tas2552->tdm_delay;

	/* Configure data delay */
	snd_soc_write(codec, TAS2552_SER_CTRL_2, delay);

	return 0;
}

static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct snd_soc_codec *codec = dai->codec;
	struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
	u8 serial_format;

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
		serial_format = 0x00;
		break;
	case SND_SOC_DAIFMT_CBS_CFM:
		serial_format = TAS2552_WCLKDIR;
		break;
	case SND_SOC_DAIFMT_CBM_CFS:
		serial_format = TAS2552_BCLKDIR;
		break;
	case SND_SOC_DAIFMT_CBM_CFM:
		serial_format = (TAS2552_BCLKDIR | TAS2552_WCLKDIR);
		break;
	default:
		dev_vdbg(codec->dev, "DAI Format master is not found\n");
		return -EINVAL;
	}

	switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK |
		       SND_SOC_DAIFMT_INV_MASK)) {
	case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF):
		break;
	case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF):
	case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF):
		serial_format |= TAS2552_DATAFORMAT_DSP;
		break;
	case (SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_NB_NF):
		serial_format |= TAS2552_DATAFORMAT_RIGHT_J;
		break;
	case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF):
		serial_format |= TAS2552_DATAFORMAT_LEFT_J;
		break;
	default:
		dev_vdbg(codec->dev, "DAI Format is not found\n");
		return -EINVAL;
	}
	tas2552->dai_fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;

	snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, TAS2552_DAI_FMT_MASK,
			    serial_format);
	return 0;
}

static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
				  unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = dai->codec;
	struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
	u8 reg, mask, val;

	switch (clk_id) {
	case TAS2552_PLL_CLKIN_MCLK:
	case TAS2552_PLL_CLKIN_BCLK:
	case TAS2552_PLL_CLKIN_IVCLKIN:
	case TAS2552_PLL_CLKIN_1_8_FIXED:
		mask = TAS2552_PLL_SRC_MASK;
		val = (clk_id << 3) & mask; /* bit 4:5 in the register */
		reg = TAS2552_CFG_1;
		tas2552->pll_clkin = freq;
		break;
	case TAS2552_PDM_CLK_PLL:
	case TAS2552_PDM_CLK_IVCLKIN:
	case TAS2552_PDM_CLK_BCLK:
	case TAS2552_PDM_CLK_MCLK:
		mask = TAS2552_PDM_CLK_SEL_MASK;
		val = (clk_id >> 1) & mask; /* bit 0:1 in the register */
		reg = TAS2552_PDM_CFG;
		tas2552->pdm_clk = freq;
		break;
	default:
		dev_err(codec->dev, "Invalid clk id: %d\n", clk_id);
		return -EINVAL;
	}

	snd_soc_update_bits(codec, reg, mask, val);

	return 0;
}

static int tas2552_set_dai_tdm_slot(struct snd_soc_dai *dai,
				    unsigned int tx_mask, unsigned int rx_mask,
				    int slots, int slot_width)
{
	struct snd_soc_codec *codec = dai->codec;
	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	unsigned int lsb;

	if (unlikely(!tx_mask)) {
		dev_err(codec->dev, "tx masks need to be non 0\n");
		return -EINVAL;
	}

	/* TDM based on DSP mode requires slots to be adjacent */
	lsb = __ffs(tx_mask);
	if ((lsb + 1) != __fls(tx_mask)) {
		dev_err(codec->dev, "Invalid mask, slots must be adjacent\n");
		return -EINVAL;
	}

	tas2552->tdm_delay = lsb * slot_width;

	/* DOUT in high-impedance on inactive bit clocks */
	snd_soc_update_bits(codec, TAS2552_DOUT,
			    TAS2552_SDOUT_TRISTATE, TAS2552_SDOUT_TRISTATE);

	return 0;
}

static int tas2552_mute(struct snd_soc_dai *dai, int mute)
{
	u8 cfg1_reg = 0;
	struct snd_soc_codec *codec = dai->codec;

	if (mute)
		cfg1_reg |= TAS2552_MUTE;

	snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE, cfg1_reg);

	return 0;
}

#ifdef CONFIG_PM
static int tas2552_runtime_suspend(struct device *dev)
{
	struct tas2552_data *tas2552 = dev_get_drvdata(dev);

	tas2552_sw_shutdown(tas2552, 1);

	regcache_cache_only(tas2552->regmap, true);
	regcache_mark_dirty(tas2552->regmap);

	if (tas2552->enable_gpio)
		gpiod_set_value(tas2552->enable_gpio, 0);

	return 0;
}

static int tas2552_runtime_resume(struct device *dev)
{
	struct tas2552_data *tas2552 = dev_get_drvdata(dev);

	if (tas2552->enable_gpio)
		gpiod_set_value(tas2552->enable_gpio, 1);

	tas2552_sw_shutdown(tas2552, 0);

	regcache_cache_only(tas2552->regmap, false);
	regcache_sync(tas2552->regmap);

	return 0;
}
#endif

static const struct dev_pm_ops tas2552_pm = {
	SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
			   NULL)
};

static struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
	.hw_params	= tas2552_hw_params,
	.prepare	= tas2552_prepare,
	.set_sysclk	= tas2552_set_dai_sysclk,
	.set_fmt	= tas2552_set_dai_fmt,
	.set_tdm_slot	= tas2552_set_dai_tdm_slot,
	.digital_mute = tas2552_mute,
};

/* Formats supported by TAS2552 driver. */
#define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
			 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

/* TAS2552 dai structure. */
static struct snd_soc_dai_driver tas2552_dai[] = {
	{
		.name = "tas2552-amplifier",
		.playback = {
			.stream_name = "Playback",
			.channels_min = 2,
			.channels_max = 2,
			.rates = SNDRV_PCM_RATE_8000_192000,
			.formats = TAS2552_FORMATS,
		},
		.ops = &tas2552_speaker_dai_ops,
	},
};

/*
 * DAC digital volumes. From -7 to 24 dB in 1 dB steps
 */
static DECLARE_TLV_DB_SCALE(dac_tlv, -7, 100, 0);

static const struct snd_kcontrol_new tas2552_snd_controls[] = {
	SOC_SINGLE_TLV("Speaker Driver Playback Volume",
			 TAS2552_PGA_GAIN, 0, 0x1f, 0, dac_tlv),
};

static int tas2552_codec_probe(struct snd_soc_codec *codec)
{
	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	int ret;

	tas2552->codec = codec;

	ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
				    tas2552->supplies);

	if (ret != 0) {
		dev_err(codec->dev, "Failed to enable supplies: %d\n",
			ret);
		return ret;
	}

	if (tas2552->enable_gpio)
		gpiod_set_value(tas2552->enable_gpio, 1);

	ret = pm_runtime_get_sync(codec->dev);
	if (ret < 0) {
		dev_err(codec->dev, "Enabling device failed: %d\n",
			ret);
		goto probe_fail;
	}

	snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE, TAS2552_MUTE);
	snd_soc_write(codec, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL |
				TAS2552_DIN_SRC_SEL_AVG_L_R | TAS2552_88_96KHZ);
	snd_soc_write(codec, TAS2552_DOUT, TAS2552_PDM_DATA_I);
	snd_soc_write(codec, TAS2552_OUTPUT_DATA, TAS2552_PDM_DATA_V_I | 0x8);
	snd_soc_write(codec, TAS2552_BOOST_PT_CTRL, TAS2552_APT_DELAY_200 |
				TAS2552_APT_THRESH_2_1_7);

	snd_soc_write(codec, TAS2552_CFG_2, TAS2552_BOOST_EN |
				  TAS2552_APT_EN | TAS2552_LIM_EN);

	return 0;

probe_fail:
	if (tas2552->enable_gpio)
		gpiod_set_value(tas2552->enable_gpio, 0);

	regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
					tas2552->supplies);
	return -EIO;
}

static int tas2552_codec_remove(struct snd_soc_codec *codec)
{
	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);

	pm_runtime_put(codec->dev);

	if (tas2552->enable_gpio)
		gpiod_set_value(tas2552->enable_gpio, 0);

	return 0;
};

#ifdef CONFIG_PM
static int tas2552_suspend(struct snd_soc_codec *codec)
{
	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	int ret;

	ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
					tas2552->supplies);

	if (ret != 0)
		dev_err(codec->dev, "Failed to disable supplies: %d\n",
			ret);
	return 0;
}

static int tas2552_resume(struct snd_soc_codec *codec)
{
	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	int ret;

	ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
				    tas2552->supplies);

	if (ret != 0) {
		dev_err(codec->dev, "Failed to enable supplies: %d\n",
			ret);
	}

	return 0;
}
#else
#define tas2552_suspend NULL
#define tas2552_resume NULL
#endif

static struct snd_soc_codec_driver soc_codec_dev_tas2552 = {
	.probe = tas2552_codec_probe,
	.remove = tas2552_codec_remove,
	.suspend =	tas2552_suspend,
	.resume = tas2552_resume,
	.ignore_pmdown_time = true,

	.controls = tas2552_snd_controls,
	.num_controls = ARRAY_SIZE(tas2552_snd_controls),
	.dapm_widgets = tas2552_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(tas2552_dapm_widgets),
	.dapm_routes = tas2552_audio_map,
	.num_dapm_routes = ARRAY_SIZE(tas2552_audio_map),
};

static const struct regmap_config tas2552_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = TAS2552_MAX_REG,
	.reg_defaults = tas2552_reg_defs,
	.num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
	.cache_type = REGCACHE_RBTREE,
};

static int tas2552_probe(struct i2c_client *client,
			   const struct i2c_device_id *id)
{
	struct device *dev;
	struct tas2552_data *data;
	int ret;
	int i;

	dev = &client->dev;
	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
	if (data == NULL)
		return -ENOMEM;

	data->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
	if (IS_ERR(data->enable_gpio)) {
		if (PTR_ERR(data->enable_gpio) == -EPROBE_DEFER)
			return -EPROBE_DEFER;

		data->enable_gpio = NULL;;
	}

	data->tas2552_client = client;
	data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
	if (IS_ERR(data->regmap)) {
		ret = PTR_ERR(data->regmap);
		dev_err(&client->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
		data->supplies[i].supply = tas2552_supply_names[i];

	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
				      data->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to request supplies: %d\n", ret);
		return ret;
	}

	pm_runtime_set_active(&client->dev);
	pm_runtime_set_autosuspend_delay(&client->dev, 1000);
	pm_runtime_use_autosuspend(&client->dev);
	pm_runtime_enable(&client->dev);
	pm_runtime_mark_last_busy(&client->dev);
	pm_runtime_put_sync_autosuspend(&client->dev);

	dev_set_drvdata(&client->dev, data);

	ret = snd_soc_register_codec(&client->dev,
				      &soc_codec_dev_tas2552,
				      tas2552_dai, ARRAY_SIZE(tas2552_dai));
	if (ret < 0)
		dev_err(&client->dev, "Failed to register codec: %d\n", ret);

	return ret;
}

static int tas2552_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	return 0;
}

static const struct i2c_device_id tas2552_id[] = {
	{ "tas2552", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tas2552_id);

#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id tas2552_of_match[] = {
	{ .compatible = "ti,tas2552", },
	{},
};
MODULE_DEVICE_TABLE(of, tas2552_of_match);
#endif

static struct i2c_driver tas2552_i2c_driver = {
	.driver = {
		.name = "tas2552",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(tas2552_of_match),
		.pm = &tas2552_pm,
	},
	.probe = tas2552_probe,
	.remove = tas2552_i2c_remove,
	.id_table = tas2552_id,
};

module_i2c_driver(tas2552_i2c_driver);

MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
5df7f71d DM	1	/*
	2	* tas2552.c - ALSA SoC Texas Instruments TAS2552 Mono Audio Amplifier
	3	*
	4	* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
	5	*
	6	* Author: Dan Murphy <dmurphy@ti.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*/
	17
	18	#include <linux/module.h>
	19	#include <linux/errno.h>
	20	#include <linux/device.h>
	21	#include <linux/i2c.h>
	22	#include <linux/gpio.h>
	23	#include <linux/of_gpio.h>
	24	#include <linux/pm_runtime.h>
	25	#include <linux/regmap.h>
	26	#include <linux/slab.h>
	27
	28	#include <linux/gpio/consumer.h>
	29	#include <linux/regulator/consumer.h>
	30
	31	#include <sound/pcm.h>
	32	#include <sound/pcm_params.h>
	33	#include <sound/soc.h>
	34	#include <sound/soc-dapm.h>
	35	#include <sound/tlv.h>
	36	#include <sound/tas2552-plat.h>
9d87a888	37	#include <dt-bindings/sound/tas2552.h>
5df7f71d DM	38
	39	#include "tas2552.h"
	40
	41	static struct reg_default tas2552_reg_defs[] = {
	42	{TAS2552_CFG_1, 0x22},
	43	{TAS2552_CFG_3, 0x80},
	44	{TAS2552_DOUT, 0x00},
	45	{TAS2552_OUTPUT_DATA, 0xc0},
	46	{TAS2552_PDM_CFG, 0x01},
	47	{TAS2552_PGA_GAIN, 0x00},
	48	{TAS2552_BOOST_PT_CTRL, 0x0f},
7d785025	49	{TAS2552_RESERVED_0D, 0xbe},
5df7f71d DM	50	{TAS2552_LIMIT_RATE_HYS, 0x08},
	51	{TAS2552_CFG_2, 0xef},
	52	{TAS2552_SER_CTRL_1, 0x00},
	53	{TAS2552_SER_CTRL_2, 0x00},
	54	{TAS2552_PLL_CTRL_1, 0x10},
	55	{TAS2552_PLL_CTRL_2, 0x00},
	56	{TAS2552_PLL_CTRL_3, 0x00},
	57	{TAS2552_BTIP, 0x8f},
	58	{TAS2552_BTS_CTRL, 0x80},
	59	{TAS2552_LIMIT_RELEASE, 0x04},
	60	{TAS2552_LIMIT_INT_COUNT, 0x00},
	61	{TAS2552_EDGE_RATE_CTRL, 0x40},
	62	{TAS2552_VBAT_DATA, 0x00},
	63	};
	64
	65	#define TAS2552_NUM_SUPPLIES 3
	66	static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = {
	67	"vbat", /* vbat voltage */
	68	"iovdd", /* I/O Voltage */
	69	"avdd", /* Analog DAC Voltage */
	70	};
	71
	72	struct tas2552_data {
	73	struct snd_soc_codec *codec;
	74	struct regmap *regmap;
	75	struct i2c_client *tas2552_client;
	76	struct regulator_bulk_data supplies[TAS2552_NUM_SUPPLIES];
	77	struct gpio_desc *enable_gpio;
	78	unsigned char regs[TAS2552_VBAT_DATA];
16bd3952	79	unsigned int pll_clkin;
9d87a888	80	unsigned int pdm_clk;
3f747a81 PU	81
	82	unsigned int dai_fmt;
	83	unsigned int tdm_delay;
5df7f71d DM	84	};
5df7f71d DM	85
7d785025 PU	86	static int tas2552_post_event(struct snd_soc_dapm_widget *w,
	87	struct snd_kcontrol *kcontrol, int event)
	88	{
	89	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	90
	91	switch (event) {
	92	case SND_SOC_DAPM_POST_PMU:
	93	snd_soc_write(codec, TAS2552_RESERVED_0D, 0xc0);
	94	snd_soc_update_bits(codec, TAS2552_LIMIT_RATE_HYS, (1 << 5),
	95	(1 << 5));
	96	snd_soc_update_bits(codec, TAS2552_CFG_2, 1, 0);
	97	snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_SWS, 0);
	98	break;
	99	case SND_SOC_DAPM_POST_PMD:
	100	snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_SWS,
	101	TAS2552_SWS);
	102	snd_soc_update_bits(codec, TAS2552_CFG_2, 1, 1);
	103	snd_soc_update_bits(codec, TAS2552_LIMIT_RATE_HYS, (1 << 5), 0);
	104	snd_soc_write(codec, TAS2552_RESERVED_0D, 0xbe);
	105	break;
	106	}
	107	return 0;
	108	}
a7a8e994	109
609e7131 PU	110	/* Input mux controls */
	111	static const char * const tas2552_input_texts[] = {
	112	"Digital", "Analog" };
a7a8e994 DM	113	static SOC_ENUM_SINGLE_DECL(tas2552_input_mux_enum, TAS2552_CFG_3, 7,
	114	tas2552_input_texts);
	115
609e7131 PU	116	static const struct snd_kcontrol_new tas2552_input_mux_control =
609e7131 PU	117	SOC_DAPM_ENUM("Route", tas2552_input_mux_enum);
a7a8e994 DM	118
	119	static const struct snd_soc_dapm_widget tas2552_dapm_widgets[] =
	120	{
	121	SND_SOC_DAPM_INPUT("IN"),
	122
	123	/* MUX Controls */
	124	SND_SOC_DAPM_MUX("Input selection", SND_SOC_NOPM, 0, 0,
609e7131	125	&tas2552_input_mux_control),
a7a8e994 DM	126
	127	SND_SOC_DAPM_AIF_IN("DAC IN", "DAC Playback", 0, SND_SOC_NOPM, 0, 0),
	128	SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0),
	129	SND_SOC_DAPM_OUT_DRV("ClassD", TAS2552_CFG_2, 7, 0, NULL, 0),
	130	SND_SOC_DAPM_SUPPLY("PLL", TAS2552_CFG_2, 3, 0, NULL, 0),
7d785025	131	SND_SOC_DAPM_POST("Post Event", tas2552_post_event),
a7a8e994 DM	132
	133	SND_SOC_DAPM_OUTPUT("OUT")
	134	};
	135
	136	static const struct snd_soc_dapm_route tas2552_audio_map[] = {
	137	{"DAC", NULL, "DAC IN"},
	138	{"Input selection", "Digital", "DAC"},
	139	{"Input selection", "Analog", "IN"},
	140	{"ClassD", NULL, "Input selection"},
	141	{"OUT", NULL, "ClassD"},
	142	{"ClassD", NULL, "PLL"},
	143	};
	144
641d334b	145	#ifdef CONFIG_PM
5df7f71d DM	146	static void tas2552_sw_shutdown(struct tas2552_data *tas_data, int sw_shutdown)
5df7f71d DM	147	{
dd6e3053	148	u8 cfg1_reg = 0;
5df7f71d	149
80ba2669 PU	150	if (!tas_data->codec)
	151	return;
	152
5df7f71d	153	if (sw_shutdown)
7de544fd	154	cfg1_reg = TAS2552_SWS;
5df7f71d	155
7de544fd PU	156	snd_soc_update_bits(tas_data->codec, TAS2552_CFG_1, TAS2552_SWS,
7de544fd PU	157	cfg1_reg);
5df7f71d	158	}
be1aa3ea	159	#endif
5df7f71d DM	160
	161	static int tas2552_hw_params(struct snd_pcm_substream *substream,
	162	struct snd_pcm_hw_params *params,
	163	struct snd_soc_dai *dai)
	164	{
	165	struct snd_soc_codec *codec = dai->codec;
	166	struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
	167	int sample_rate, pll_clk;
	168	int d;
	169	u8 p, j;
	170
16bd3952	171	if (!tas2552->pll_clkin)
5df7f71d DM	172	return -EINVAL;
	173
	174	snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);
	175
16bd3952 PU	176	if (tas2552->pll_clkin == TAS2552_245MHZ_CLK \|\|
16bd3952 PU	177	tas2552->pll_clkin == TAS2552_225MHZ_CLK) {
5df7f71d DM	178	/* By pass the PLL configuration */
	179	snd_soc_update_bits(codec, TAS2552_PLL_CTRL_2,
	180	TAS2552_PLL_BYPASS_MASK,
	181	TAS2552_PLL_BYPASS);
	182	} else {
	183	/* Fill in the PLL control registers for J & D
	184	* PLL_CLK = (.5 * freq * J.D) / 2^p
	185	* Need to fill in J and D here based on incoming freq
	186	*/
	187	p = snd_soc_read(codec, TAS2552_PLL_CTRL_1);
	188	p = (p >> 7);
	189	sample_rate = params_rate(params);
	190
	191	if (sample_rate == 48000)
	192	pll_clk = TAS2552_245MHZ_CLK;
	193	else if (sample_rate == 44100)
	194	pll_clk = TAS2552_225MHZ_CLK;
	195	else {
	196	dev_vdbg(codec->dev, "Substream sample rate is not found %i\n",
	197	params_rate(params));
	198	return -EINVAL;
	199	}
	200
16bd3952 PU	201	j = (pll_clk * 2 * (1 << p)) / tas2552->pll_clkin;
16bd3952 PU	202	d = (pll_clk * 2 * (1 << p)) % tas2552->pll_clkin;
5df7f71d DM	203
	204	snd_soc_update_bits(codec, TAS2552_PLL_CTRL_1,
	205	TAS2552_PLL_J_MASK, j);
	206	snd_soc_write(codec, TAS2552_PLL_CTRL_2,
	207	(d >> 7) & TAS2552_PLL_D_UPPER_MASK);
	208	snd_soc_write(codec, TAS2552_PLL_CTRL_3,
	209	d & TAS2552_PLL_D_LOWER_MASK);
	210
	211	}
	212
5df7f71d DM	213	return 0;
	214	}
	215
1b68c7dc PU	216	#define TAS2552_DAI_FMT_MASK (TAS2552_BCLKDIR \| \
	217	TAS2552_WCLKDIR \| \
	218	TAS2552_DATAFORMAT_MASK)
3f747a81 PU	219	static int tas2552_prepare(struct snd_pcm_substream *substream,
	220	struct snd_soc_dai *dai)
	221	{
	222	struct snd_soc_codec *codec = dai->codec;
	223	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	224	int delay = 0;
	225
	226	/* TDM slot selection only valid in DSP_A/_B mode */
	227	if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_A)
	228	delay += (tas2552->tdm_delay + 1);
	229	else if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_B)
	230	delay += tas2552->tdm_delay;
	231
	232	/* Configure data delay */
	233	snd_soc_write(codec, TAS2552_SER_CTRL_2, delay);
	234
	235	return 0;
	236	}
	237
5df7f71d DM	238	static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
	239	{
	240	struct snd_soc_codec *codec = dai->codec;
3f747a81	241	struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
5df7f71d	242	u8 serial_format;
5df7f71d DM	243
	244	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	245	case SND_SOC_DAIFMT_CBS_CFS:
	246	serial_format = 0x00;
	247	break;
	248	case SND_SOC_DAIFMT_CBS_CFM:
1b68c7dc	249	serial_format = TAS2552_WCLKDIR;
5df7f71d DM	250	break;
5df7f71d DM	251	case SND_SOC_DAIFMT_CBM_CFS:
1b68c7dc	252	serial_format = TAS2552_BCLKDIR;
5df7f71d DM	253	break;
5df7f71d DM	254	case SND_SOC_DAIFMT_CBM_CFM:
1b68c7dc	255	serial_format = (TAS2552_BCLKDIR \| TAS2552_WCLKDIR);
5df7f71d DM	256	break;
	257	default:
	258	dev_vdbg(codec->dev, "DAI Format master is not found\n");
	259	return -EINVAL;
	260	}
	261
4c331373 PU	262	switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK \|
	263	SND_SOC_DAIFMT_INV_MASK)) {
	264	case (SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_NB_NF):
5df7f71d	265	break;
4c331373	266	case (SND_SOC_DAIFMT_DSP_A \| SND_SOC_DAIFMT_IB_NF):
4c331373	267	case (SND_SOC_DAIFMT_DSP_B \| SND_SOC_DAIFMT_IB_NF):
1b68c7dc	268	serial_format \|= TAS2552_DATAFORMAT_DSP;
5df7f71d	269	break;
4c331373	270	case (SND_SOC_DAIFMT_RIGHT_J \| SND_SOC_DAIFMT_NB_NF):
1b68c7dc	271	serial_format \|= TAS2552_DATAFORMAT_RIGHT_J;
5df7f71d	272	break;
4c331373	273	case (SND_SOC_DAIFMT_LEFT_J \| SND_SOC_DAIFMT_NB_NF):
1b68c7dc	274	serial_format \|= TAS2552_DATAFORMAT_LEFT_J;
5df7f71d DM	275	break;
	276	default:
	277	dev_vdbg(codec->dev, "DAI Format is not found\n");
	278	return -EINVAL;
	279	}
3f747a81	280	tas2552->dai_fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
5df7f71d	281
4c331373 PU	282	snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, TAS2552_DAI_FMT_MASK,
4c331373 PU	283	serial_format);
5df7f71d DM	284	return 0;
	285	}
	286
	287	static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
	288	unsigned int freq, int dir)
	289	{
	290	struct snd_soc_codec *codec = dai->codec;
	291	struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
9d87a888 PU	292	u8 reg, mask, val;
	293
	294	switch (clk_id) {
	295	case TAS2552_PLL_CLKIN_MCLK:
	296	case TAS2552_PLL_CLKIN_BCLK:
	297	case TAS2552_PLL_CLKIN_IVCLKIN:
	298	case TAS2552_PLL_CLKIN_1_8_FIXED:
	299	mask = TAS2552_PLL_SRC_MASK;
	300	val = (clk_id << 3) & mask; /* bit 4:5 in the register */
	301	reg = TAS2552_CFG_1;
	302	tas2552->pll_clkin = freq;
	303	break;
	304	case TAS2552_PDM_CLK_PLL:
	305	case TAS2552_PDM_CLK_IVCLKIN:
	306	case TAS2552_PDM_CLK_BCLK:
	307	case TAS2552_PDM_CLK_MCLK:
	308	mask = TAS2552_PDM_CLK_SEL_MASK;
	309	val = (clk_id >> 1) & mask; /* bit 0:1 in the register */
	310	reg = TAS2552_PDM_CFG;
	311	tas2552->pdm_clk = freq;
	312	break;
	313	default:
	314	dev_err(codec->dev, "Invalid clk id: %d\n", clk_id);
	315	return -EINVAL;
	316	}
5df7f71d	317
9d87a888	318	snd_soc_update_bits(codec, reg, mask, val);
5df7f71d DM	319
	320	return 0;
	321	}
	322
3f747a81 PU	323	static int tas2552_set_dai_tdm_slot(struct snd_soc_dai *dai,
	324	unsigned int tx_mask, unsigned int rx_mask,
	325	int slots, int slot_width)
	326	{
	327	struct snd_soc_codec *codec = dai->codec;
	328	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	329	unsigned int lsb;
	330
	331	if (unlikely(!tx_mask)) {
	332	dev_err(codec->dev, "tx masks need to be non 0\n");
	333	return -EINVAL;
	334	}
	335
	336	/* TDM based on DSP mode requires slots to be adjacent */
	337	lsb = __ffs(tx_mask);
	338	if ((lsb + 1) != __fls(tx_mask)) {
	339	dev_err(codec->dev, "Invalid mask, slots must be adjacent\n");
	340	return -EINVAL;
	341	}
	342
	343	tas2552->tdm_delay = lsb * slot_width;
	344
	345	/* DOUT in high-impedance on inactive bit clocks */
	346	snd_soc_update_bits(codec, TAS2552_DOUT,
	347	TAS2552_SDOUT_TRISTATE, TAS2552_SDOUT_TRISTATE);
	348
	349	return 0;
	350	}
	351
5df7f71d DM	352	static int tas2552_mute(struct snd_soc_dai *dai, int mute)
5df7f71d DM	353	{
e3606aa4	354	u8 cfg1_reg = 0;
5df7f71d DM	355	struct snd_soc_codec *codec = dai->codec;
	356
	357	if (mute)
e3606aa4	358	cfg1_reg \|= TAS2552_MUTE;
5df7f71d	359
7de544fd	360	snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE, cfg1_reg);
5df7f71d DM	361
	362	return 0;
	363	}
	364
641d334b	365	#ifdef CONFIG_PM
5df7f71d DM	366	static int tas2552_runtime_suspend(struct device *dev)
	367	{
	368	struct tas2552_data *tas2552 = dev_get_drvdata(dev);
	369
dd6e3053	370	tas2552_sw_shutdown(tas2552, 1);
5df7f71d	371
5df7f71d DM	372	regcache_cache_only(tas2552->regmap, true);
	373	regcache_mark_dirty(tas2552->regmap);
	374
e295a4a4 DM	375	if (tas2552->enable_gpio)
	376	gpiod_set_value(tas2552->enable_gpio, 0);
	377
5df7f71d DM	378	return 0;
	379	}
	380
	381	static int tas2552_runtime_resume(struct device *dev)
	382	{
	383	struct tas2552_data *tas2552 = dev_get_drvdata(dev);
	384
	385	if (tas2552->enable_gpio)
	386	gpiod_set_value(tas2552->enable_gpio, 1);
	387
dd6e3053	388	tas2552_sw_shutdown(tas2552, 0);
5df7f71d DM	389
	390	regcache_cache_only(tas2552->regmap, false);
	391	regcache_sync(tas2552->regmap);
	392
	393	return 0;
	394	}
	395	#endif
	396
	397	static const struct dev_pm_ops tas2552_pm = {
	398	SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
	399	NULL)
	400	};
	401
5df7f71d DM	402	static struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
5df7f71d DM	403	.hw_params = tas2552_hw_params,
3f747a81	404	.prepare = tas2552_prepare,
5df7f71d DM	405	.set_sysclk = tas2552_set_dai_sysclk,
5df7f71d DM	406	.set_fmt = tas2552_set_dai_fmt,
3f747a81	407	.set_tdm_slot = tas2552_set_dai_tdm_slot,
5df7f71d DM	408	.digital_mute = tas2552_mute,
	409	};
	410
	411	/* Formats supported by TAS2552 driver. */
	412	#define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	413	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
	414
	415	/* TAS2552 dai structure. */
	416	static struct snd_soc_dai_driver tas2552_dai[] = {
	417	{
	418	.name = "tas2552-amplifier",
	419	.playback = {
a7a8e994	420	.stream_name = "Playback",
5df7f71d DM	421	.channels_min = 2,
	422	.channels_max = 2,
	423	.rates = SNDRV_PCM_RATE_8000_192000,
	424	.formats = TAS2552_FORMATS,
	425	},
	426	.ops = &tas2552_speaker_dai_ops,
	427	},
	428	};
	429
	430	/*
	431	* DAC digital volumes. From -7 to 24 dB in 1 dB steps
	432	*/
dd6ae3bc	433	static DECLARE_TLV_DB_SCALE(dac_tlv, -7, 100, 0);
5df7f71d DM	434
	435	static const struct snd_kcontrol_new tas2552_snd_controls[] = {
	436	SOC_SINGLE_TLV("Speaker Driver Playback Volume",
dd6ae3bc	437	TAS2552_PGA_GAIN, 0, 0x1f, 0, dac_tlv),
5df7f71d DM	438	};
5df7f71d DM	439
5df7f71d DM	440	static int tas2552_codec_probe(struct snd_soc_codec *codec)
	441	{
	442	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	443	int ret;
	444
	445	tas2552->codec = codec;
	446
	447	ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
	448	tas2552->supplies);
	449
	450	if (ret != 0) {
	451	dev_err(codec->dev, "Failed to enable supplies: %d\n",
	452	ret);
	453	return ret;
	454	}
	455
	456	if (tas2552->enable_gpio)
	457	gpiod_set_value(tas2552->enable_gpio, 1);
	458
	459	ret = pm_runtime_get_sync(codec->dev);
	460	if (ret < 0) {
	461	dev_err(codec->dev, "Enabling device failed: %d\n",
	462	ret);
	463	goto probe_fail;
	464	}
	465
7d785025	466	snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE, TAS2552_MUTE);
5df7f71d DM	467	snd_soc_write(codec, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL \|
	468	TAS2552_DIN_SRC_SEL_AVG_L_R \| TAS2552_88_96KHZ);
	469	snd_soc_write(codec, TAS2552_DOUT, TAS2552_PDM_DATA_I);
	470	snd_soc_write(codec, TAS2552_OUTPUT_DATA, TAS2552_PDM_DATA_V_I \| 0x8);
5df7f71d DM	471	snd_soc_write(codec, TAS2552_BOOST_PT_CTRL, TAS2552_APT_DELAY_200 \|
	472	TAS2552_APT_THRESH_2_1_7);
	473
a7a8e994 DM	474	snd_soc_write(codec, TAS2552_CFG_2, TAS2552_BOOST_EN \|
	475	TAS2552_APT_EN \| TAS2552_LIM_EN);
	476
5df7f71d DM	477	return 0;
5df7f71d DM	478
5df7f71d DM	479	probe_fail:
	480	if (tas2552->enable_gpio)
	481	gpiod_set_value(tas2552->enable_gpio, 0);
	482
	483	regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
	484	tas2552->supplies);
	485	return -EIO;
	486	}
	487
	488	static int tas2552_codec_remove(struct snd_soc_codec *codec)
	489	{
	490	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	491
e295a4a4 DM	492	pm_runtime_put(codec->dev);
e295a4a4 DM	493
5df7f71d DM	494	if (tas2552->enable_gpio)
	495	gpiod_set_value(tas2552->enable_gpio, 0);
	496
	497	return 0;
	498	};
	499
	500	#ifdef CONFIG_PM
	501	static int tas2552_suspend(struct snd_soc_codec *codec)
	502	{
	503	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	504	int ret;
	505
	506	ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
	507	tas2552->supplies);
	508
	509	if (ret != 0)
	510	dev_err(codec->dev, "Failed to disable supplies: %d\n",
	511	ret);
	512	return 0;
	513	}
	514
	515	static int tas2552_resume(struct snd_soc_codec *codec)
	516	{
	517	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	518	int ret;
	519
	520	ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
	521	tas2552->supplies);
	522
	523	if (ret != 0) {
	524	dev_err(codec->dev, "Failed to enable supplies: %d\n",
	525	ret);
	526	}
	527
	528	return 0;
	529	}
	530	#else
	531	#define tas2552_suspend NULL
	532	#define tas2552_resume NULL
	533	#endif
	534
	535	static struct snd_soc_codec_driver soc_codec_dev_tas2552 = {
	536	.probe = tas2552_codec_probe,
	537	.remove = tas2552_codec_remove,
	538	.suspend = tas2552_suspend,
	539	.resume = tas2552_resume,
7d785025 PU	540	.ignore_pmdown_time = true,
7d785025 PU	541
5df7f71d DM	542	.controls = tas2552_snd_controls,
5df7f71d DM	543	.num_controls = ARRAY_SIZE(tas2552_snd_controls),
e3f1ff31 LPC	544	.dapm_widgets = tas2552_dapm_widgets,
	545	.num_dapm_widgets = ARRAY_SIZE(tas2552_dapm_widgets),
	546	.dapm_routes = tas2552_audio_map,
	547	.num_dapm_routes = ARRAY_SIZE(tas2552_audio_map),
5df7f71d DM	548	};
	549
	550	static const struct regmap_config tas2552_regmap_config = {
	551	.reg_bits = 8,
	552	.val_bits = 8,
	553
	554	.max_register = TAS2552_MAX_REG,
	555	.reg_defaults = tas2552_reg_defs,
	556	.num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
	557	.cache_type = REGCACHE_RBTREE,
	558	};
	559
	560	static int tas2552_probe(struct i2c_client *client,
	561	const struct i2c_device_id *id)
	562	{
	563	struct device *dev;
	564	struct tas2552_data *data;
	565	int ret;
	566	int i;
	567
	568	dev = &client->dev;
	569	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
	570	if (data == NULL)
	571	return -ENOMEM;
	572
34d7c390	573	data->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
ea178d14 PU	574	if (IS_ERR(data->enable_gpio)) {
	575	if (PTR_ERR(data->enable_gpio) == -EPROBE_DEFER)
	576	return -EPROBE_DEFER;
	577
	578	data->enable_gpio = NULL;;
	579	}
5df7f71d DM	580
	581	data->tas2552_client = client;
	582	data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
	583	if (IS_ERR(data->regmap)) {
	584	ret = PTR_ERR(data->regmap);
	585	dev_err(&client->dev, "Failed to allocate register map: %d\n",
	586	ret);
	587	return ret;
	588	}
	589
	590	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
	591	data->supplies[i].supply = tas2552_supply_names[i];
	592
	593	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
	594	data->supplies);
c62f9d8f	595	if (ret != 0) {
5df7f71d	596	dev_err(dev, "Failed to request supplies: %d\n", ret);
c62f9d8f AL	597	return ret;
c62f9d8f AL	598	}
5df7f71d DM	599
	600	pm_runtime_set_active(&client->dev);
	601	pm_runtime_set_autosuspend_delay(&client->dev, 1000);
	602	pm_runtime_use_autosuspend(&client->dev);
	603	pm_runtime_enable(&client->dev);
	604	pm_runtime_mark_last_busy(&client->dev);
	605	pm_runtime_put_sync_autosuspend(&client->dev);
	606
	607	dev_set_drvdata(&client->dev, data);
	608
	609	ret = snd_soc_register_codec(&client->dev,
	610	&soc_codec_dev_tas2552,
	611	tas2552_dai, ARRAY_SIZE(tas2552_dai));
	612	if (ret < 0)
	613	dev_err(&client->dev, "Failed to register codec: %d\n", ret);
	614
c62f9d8f	615	return ret;
5df7f71d DM	616	}
	617
	618	static int tas2552_i2c_remove(struct i2c_client *client)
	619	{
	620	snd_soc_unregister_codec(&client->dev);
	621	return 0;
	622	}
	623
	624	static const struct i2c_device_id tas2552_id[] = {
	625	{ "tas2552", 0 },
	626	{ }
	627	};
	628	MODULE_DEVICE_TABLE(i2c, tas2552_id);
	629
	630	#if IS_ENABLED(CONFIG_OF)
	631	static const struct of_device_id tas2552_of_match[] = {
	632	{ .compatible = "ti,tas2552", },
	633	{},
	634	};
	635	MODULE_DEVICE_TABLE(of, tas2552_of_match);
	636	#endif
	637
	638	static struct i2c_driver tas2552_i2c_driver = {
	639	.driver = {
	640	.name = "tas2552",
	641	.owner = THIS_MODULE,
	642	.of_match_table = of_match_ptr(tas2552_of_match),
	643	.pm = &tas2552_pm,
	644	},
	645	.probe = tas2552_probe,
	646	.remove = tas2552_i2c_remove,
	647	.id_table = tas2552_id,
	648	};
	649
	650	module_i2c_driver(tas2552_i2c_driver);
	651
	652	MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
	653	MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
	654	MODULE_LICENSE("GPL");