[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 "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, 0x00},
	{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 mclk;
};

/* Input mux controls */
static const char *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("Input selection", 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_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"},
};

static void tas2552_sw_shutdown(struct tas2552_data *tas_data, int sw_shutdown)
{
	u8 cfg1_reg;

	if (sw_shutdown)
		cfg1_reg = 0;
	else
		cfg1_reg = TAS2552_SWS_MASK;

	snd_soc_update_bits(tas_data->codec, TAS2552_CFG_1,
						 TAS2552_SWS_MASK, cfg1_reg);
}

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->mclk)
		return -EINVAL;

	snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);

	if (tas2552->mclk == TAS2552_245MHZ_CLK ||
		tas2552->mclk == 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->mclk;
		d = (pll_clk * 2 * (1 << p)) % tas2552->mclk;

		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;
}

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

	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_WORD_CLK_MASK;
		break;
	case SND_SOC_DAIFMT_CBM_CFS:
		serial_format = TAS2552_BIT_CLK_MASK;
		break;
	case SND_SOC_DAIFMT_CBM_CFM:
		serial_format = (TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK);
		break;
	default:
		dev_vdbg(codec->dev, "DAI Format master is not found\n");
		return -EINVAL;
	}

	serial_control_mask = TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK;

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		serial_format &= TAS2552_DAIFMT_I2S_MASK;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		serial_format |= TAS2552_DAIFMT_DSP;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		serial_format |= TAS2552_DAIFMT_RIGHT_J;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		serial_format |= TAS2552_DAIFMT_LEFT_J;
		break;
	default:
		dev_vdbg(codec->dev, "DAI Format is not found\n");
		return -EINVAL;
	}

	if (fmt & SND_SOC_DAIFMT_FORMAT_MASK)
		serial_control_mask |= TAS2552_DATA_FORMAT_MASK;

	snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, serial_control_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);

	tas2552->mclk = freq;

	return 0;
}

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

	if (mute)
		cfg1_reg = TAS2552_MUTE_MASK;
	else
		cfg1_reg = ~TAS2552_MUTE_MASK;

	snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK, cfg1_reg);

	return 0;
}

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

	tas2552_sw_shutdown(tas2552, 0);

	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, 1);

	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,
	.set_sysclk	= tas2552_set_dai_sysclk,
	.set_fmt	= tas2552_set_dai_fmt,
	.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, 24);

static const struct snd_kcontrol_new tas2552_snd_controls[] = {
	SOC_SINGLE_TLV("Speaker Driver Playback Volume",
			 TAS2552_PGA_GAIN, 0, 0x1f, 1, dac_tlv),
	SOC_DAPM_SINGLE("Playback AMP", SND_SOC_NOPM, 0, 1, 0),
};

static const struct reg_default tas2552_init_regs[] = {
	{ TAS2552_RESERVED_0D, 0xc0 },
};

static int tas2552_codec_probe(struct snd_soc_codec *codec)
{
	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	struct snd_soc_dapm_context *dapm = &codec->dapm;
	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_write(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK |
				TAS2552_PLL_SRC_BCLK);
	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_PDM_CFG, TAS2552_PDM_BCLK_SEL);
	snd_soc_write(codec, TAS2552_BOOST_PT_CTRL, TAS2552_APT_DELAY_200 |
				TAS2552_APT_THRESH_2_1_7);

	ret = regmap_register_patch(tas2552->regmap, tas2552_init_regs,
					    ARRAY_SIZE(tas2552_init_regs));
	if (ret != 0) {
		dev_err(codec->dev, "Failed to write init registers: %d\n",
			ret);
		goto patch_fail;
	}

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

	snd_soc_dapm_new_controls(dapm, tas2552_dapm_widgets,
				ARRAY_SIZE(tas2552_dapm_widgets));
	snd_soc_dapm_add_routes(dapm, tas2552_audio_map,
				ARRAY_SIZE(tas2552_audio_map));

	return 0;

patch_fail:
	pm_runtime_put(codec->dev);
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,
	.controls = tas2552_snd_controls,
	.num_controls = ARRAY_SIZE(tas2552_snd_controls),
};

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");
	if (IS_ERR(data->enable_gpio)) {
		ret = PTR_ERR(data->enable_gpio);
		if (ret != -ENOENT && ret != -ENOSYS)
			return ret;

		data->enable_gpio = NULL;
	} else {
		gpiod_direction_output(data->enable_gpio, 0);
	}

	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>
	37
	38	#include "tas2552.h"
	39
	40	static struct reg_default tas2552_reg_defs[] = {
	41	{TAS2552_CFG_1, 0x22},
	42	{TAS2552_CFG_3, 0x80},
	43	{TAS2552_DOUT, 0x00},
	44	{TAS2552_OUTPUT_DATA, 0xc0},
	45	{TAS2552_PDM_CFG, 0x01},
	46	{TAS2552_PGA_GAIN, 0x00},
	47	{TAS2552_BOOST_PT_CTRL, 0x0f},
	48	{TAS2552_RESERVED_0D, 0x00},
	49	{TAS2552_LIMIT_RATE_HYS, 0x08},
	50	{TAS2552_CFG_2, 0xef},
	51	{TAS2552_SER_CTRL_1, 0x00},
	52	{TAS2552_SER_CTRL_2, 0x00},
	53	{TAS2552_PLL_CTRL_1, 0x10},
	54	{TAS2552_PLL_CTRL_2, 0x00},
	55	{TAS2552_PLL_CTRL_3, 0x00},
	56	{TAS2552_BTIP, 0x8f},
	57	{TAS2552_BTS_CTRL, 0x80},
	58	{TAS2552_LIMIT_RELEASE, 0x04},
	59	{TAS2552_LIMIT_INT_COUNT, 0x00},
	60	{TAS2552_EDGE_RATE_CTRL, 0x40},
	61	{TAS2552_VBAT_DATA, 0x00},
	62	};
	63
	64	#define TAS2552_NUM_SUPPLIES 3
65	static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = {
66	"vbat", /* vbat voltage */
67	"iovdd", /* I/O Voltage */
68	"avdd", /* Analog DAC Voltage */
69	};
70
71	struct tas2552_data {
72	struct snd_soc_codec *codec;
73	struct regmap *regmap;
74	struct i2c_client *tas2552_client;
75	struct regulator_bulk_data supplies[TAS2552_NUM_SUPPLIES];
76	struct gpio_desc *enable_gpio;
77	unsigned char regs[TAS2552_VBAT_DATA];
78	unsigned int mclk;
79	};
80
a7a8e994 DM	81	/* Input mux controls */
	82	static const char *tas2552_input_texts[] = {
	83	"Digital", "Analog"
	84	};
	85
	86	static SOC_ENUM_SINGLE_DECL(tas2552_input_mux_enum, TAS2552_CFG_3, 7,
	87	tas2552_input_texts);
	88
	89	static const struct snd_kcontrol_new tas2552_input_mux_control[] = {
	90	SOC_DAPM_ENUM("Input selection", tas2552_input_mux_enum)
	91	};
	92
	93	static const struct snd_soc_dapm_widget tas2552_dapm_widgets[] =
	94	{
	95	SND_SOC_DAPM_INPUT("IN"),
	96
	97	/* MUX Controls */
	98	SND_SOC_DAPM_MUX("Input selection", SND_SOC_NOPM, 0, 0,
	99	tas2552_input_mux_control),
	100
	101	SND_SOC_DAPM_AIF_IN("DAC IN", "DAC Playback", 0, SND_SOC_NOPM, 0, 0),
	102	SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0),
	103	SND_SOC_DAPM_OUT_DRV("ClassD", TAS2552_CFG_2, 7, 0, NULL, 0),
	104	SND_SOC_DAPM_SUPPLY("PLL", TAS2552_CFG_2, 3, 0, NULL, 0),
	105
	106	SND_SOC_DAPM_OUTPUT("OUT")
	107	};
	108
	109	static const struct snd_soc_dapm_route tas2552_audio_map[] = {
	110	{"DAC", NULL, "DAC IN"},
	111	{"Input selection", "Digital", "DAC"},
	112	{"Input selection", "Analog", "IN"},
	113	{"ClassD", NULL, "Input selection"},
	114	{"OUT", NULL, "ClassD"},
	115	{"ClassD", NULL, "PLL"},
	116	};
	117
5df7f71d DM	118	static void tas2552_sw_shutdown(struct tas2552_data *tas_data, int sw_shutdown)
	119	{
	120	u8 cfg1_reg;
	121
	122	if (sw_shutdown)
	123	cfg1_reg = 0;
	124	else
	125	cfg1_reg = TAS2552_SWS_MASK;
	126
	127	snd_soc_update_bits(tas_data->codec, TAS2552_CFG_1,
	128	TAS2552_SWS_MASK, cfg1_reg);
	129	}
	130
	131	static int tas2552_hw_params(struct snd_pcm_substream *substream,
	132	struct snd_pcm_hw_params *params,
	133	struct snd_soc_dai *dai)
	134	{
	135	struct snd_soc_codec *codec = dai->codec;
	136	struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
	137	int sample_rate, pll_clk;
	138	int d;
	139	u8 p, j;
	140
5df7f71d DM	141	if (!tas2552->mclk)
	142	return -EINVAL;
	143
	144	snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);
	145
	146	if (tas2552->mclk == TAS2552_245MHZ_CLK \|\|
	147	tas2552->mclk == TAS2552_225MHZ_CLK) {
	148	/* By pass the PLL configuration */
	149	snd_soc_update_bits(codec, TAS2552_PLL_CTRL_2,
	150	TAS2552_PLL_BYPASS_MASK,
	151	TAS2552_PLL_BYPASS);
	152	} else {
	153	/* Fill in the PLL control registers for J & D
	154	* PLL_CLK = (.5 * freq * J.D) / 2^p
	155	* Need to fill in J and D here based on incoming freq
	156	*/
	157	p = snd_soc_read(codec, TAS2552_PLL_CTRL_1);
	158	p = (p >> 7);
	159	sample_rate = params_rate(params);
	160
	161	if (sample_rate == 48000)
	162	pll_clk = TAS2552_245MHZ_CLK;
	163	else if (sample_rate == 44100)
	164	pll_clk = TAS2552_225MHZ_CLK;
	165	else {
	166	dev_vdbg(codec->dev, "Substream sample rate is not found %i\n",
	167	params_rate(params));
	168	return -EINVAL;
	169	}
	170
	171	j = (pll_clk * 2 * (1 << p)) / tas2552->mclk;
	172	d = (pll_clk * 2 * (1 << p)) % tas2552->mclk;
	173
	174	snd_soc_update_bits(codec, TAS2552_PLL_CTRL_1,
	175	TAS2552_PLL_J_MASK, j);
	176	snd_soc_write(codec, TAS2552_PLL_CTRL_2,
	177	(d >> 7) & TAS2552_PLL_D_UPPER_MASK);
	178	snd_soc_write(codec, TAS2552_PLL_CTRL_3,
	179	d & TAS2552_PLL_D_LOWER_MASK);
	180
	181	}
	182
5df7f71d DM	183	return 0;
	184	}
	185
	186	static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
	187	{
	188	struct snd_soc_codec *codec = dai->codec;
	189	u8 serial_format;
	190	u8 serial_control_mask;
	191
	192	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	193	case SND_SOC_DAIFMT_CBS_CFS:
	194	serial_format = 0x00;
	195	break;
	196	case SND_SOC_DAIFMT_CBS_CFM:
	197	serial_format = TAS2552_WORD_CLK_MASK;
	198	break;
	199	case SND_SOC_DAIFMT_CBM_CFS:
	200	serial_format = TAS2552_BIT_CLK_MASK;
	201	break;
	202	case SND_SOC_DAIFMT_CBM_CFM:
	203	serial_format = (TAS2552_BIT_CLK_MASK \| TAS2552_WORD_CLK_MASK);
	204	break;
	205	default:
	206	dev_vdbg(codec->dev, "DAI Format master is not found\n");
	207	return -EINVAL;
	208	}
	209
	210	serial_control_mask = TAS2552_BIT_CLK_MASK \| TAS2552_WORD_CLK_MASK;
	211
	212	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	213	case SND_SOC_DAIFMT_I2S:
	214	serial_format &= TAS2552_DAIFMT_I2S_MASK;
	215	break;
	216	case SND_SOC_DAIFMT_DSP_A:
	217	serial_format \|= TAS2552_DAIFMT_DSP;
	218	break;
	219	case SND_SOC_DAIFMT_RIGHT_J:
	220	serial_format \|= TAS2552_DAIFMT_RIGHT_J;
	221	break;
	222	case SND_SOC_DAIFMT_LEFT_J:
	223	serial_format \|= TAS2552_DAIFMT_LEFT_J;
	224	break;
	225	default:
	226	dev_vdbg(codec->dev, "DAI Format is not found\n");
	227	return -EINVAL;
	228	}
	229
	230	if (fmt & SND_SOC_DAIFMT_FORMAT_MASK)
	231	serial_control_mask \|= TAS2552_DATA_FORMAT_MASK;
	232
	233	snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, serial_control_mask,
	234	serial_format);
	235
	236	return 0;
	237	}
	238
	239	static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
	240	unsigned int freq, int dir)
	241	{
	242	struct snd_soc_codec *codec = dai->codec;
	243	struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
	244
	245	tas2552->mclk = freq;
	246
247	return 0;
248	}
249
250	static int tas2552_mute(struct snd_soc_dai *dai, int mute)
251	{
252	u8 cfg1_reg;
253	struct snd_soc_codec *codec = dai->codec;
254
255	if (mute)
256	cfg1_reg = TAS2552_MUTE_MASK;
257	else
258	cfg1_reg = ~TAS2552_MUTE_MASK;
259
260	snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK, cfg1_reg);
261
262	return 0;
263	}
264
265	#ifdef CONFIG_PM_RUNTIME
266	static int tas2552_runtime_suspend(struct device *dev)
267	{
268	struct tas2552_data *tas2552 = dev_get_drvdata(dev);
269
270	tas2552_sw_shutdown(tas2552, 0);
271
5df7f71d DM	272	regcache_cache_only(tas2552->regmap, true);
	273	regcache_mark_dirty(tas2552->regmap);
	274
e295a4a4 DM	275	if (tas2552->enable_gpio)
	276	gpiod_set_value(tas2552->enable_gpio, 0);
	277
5df7f71d DM	278	return 0;
	279	}
	280
	281	static int tas2552_runtime_resume(struct device *dev)
	282	{
	283	struct tas2552_data *tas2552 = dev_get_drvdata(dev);
	284
	285	if (tas2552->enable_gpio)
	286	gpiod_set_value(tas2552->enable_gpio, 1);
	287
	288	tas2552_sw_shutdown(tas2552, 1);
	289
	290	regcache_cache_only(tas2552->regmap, false);
	291	regcache_sync(tas2552->regmap);
	292
	293	return 0;
	294	}
	295	#endif
	296
	297	static const struct dev_pm_ops tas2552_pm = {
	298	SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
	299	NULL)
	300	};
	301
5df7f71d DM	302	static struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
	303	.hw_params = tas2552_hw_params,
	304	.set_sysclk = tas2552_set_dai_sysclk,
	305	.set_fmt = tas2552_set_dai_fmt,
5df7f71d DM	306	.digital_mute = tas2552_mute,
	307	};
	308
	309	/* Formats supported by TAS2552 driver. */
	310	#define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	311	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
	312
	313	/* TAS2552 dai structure. */
	314	static struct snd_soc_dai_driver tas2552_dai[] = {
	315	{
	316	.name = "tas2552-amplifier",
	317	.playback = {
a7a8e994	318	.stream_name = "Playback",
5df7f71d DM	319	.channels_min = 2,
	320	.channels_max = 2,
	321	.rates = SNDRV_PCM_RATE_8000_192000,
	322	.formats = TAS2552_FORMATS,
	323	},
	324	.ops = &tas2552_speaker_dai_ops,
	325	},
	326	};
	327
	328	/*
	329	* DAC digital volumes. From -7 to 24 dB in 1 dB steps
	330	*/
	331	static DECLARE_TLV_DB_SCALE(dac_tlv, -7, 100, 24);
	332
	333	static const struct snd_kcontrol_new tas2552_snd_controls[] = {
	334	SOC_SINGLE_TLV("Speaker Driver Playback Volume",
	335	TAS2552_PGA_GAIN, 0, 0x1f, 1, dac_tlv),
a7a8e994	336	SOC_DAPM_SINGLE("Playback AMP", SND_SOC_NOPM, 0, 1, 0),
5df7f71d DM	337	};
	338
	339	static const struct reg_default tas2552_init_regs[] = {
	340	{ TAS2552_RESERVED_0D, 0xc0 },
	341	};
	342
	343	static int tas2552_codec_probe(struct snd_soc_codec *codec)
	344	{
	345	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
a7a8e994	346	struct snd_soc_dapm_context *dapm = &codec->dapm;
5df7f71d DM	347	int ret;
	348
	349	tas2552->codec = codec;
	350
	351	ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
	352	tas2552->supplies);
	353
	354	if (ret != 0) {
	355	dev_err(codec->dev, "Failed to enable supplies: %d\n",
	356	ret);
	357	return ret;
	358	}
	359
	360	if (tas2552->enable_gpio)
	361	gpiod_set_value(tas2552->enable_gpio, 1);
	362
	363	ret = pm_runtime_get_sync(codec->dev);
	364	if (ret < 0) {
	365	dev_err(codec->dev, "Enabling device failed: %d\n",
	366	ret);
	367	goto probe_fail;
	368	}
	369
	370	snd_soc_write(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK \|
	371	TAS2552_PLL_SRC_BCLK);
	372	snd_soc_write(codec, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL \|
	373	TAS2552_DIN_SRC_SEL_AVG_L_R \| TAS2552_88_96KHZ);
	374	snd_soc_write(codec, TAS2552_DOUT, TAS2552_PDM_DATA_I);
	375	snd_soc_write(codec, TAS2552_OUTPUT_DATA, TAS2552_PDM_DATA_V_I \| 0x8);
	376	snd_soc_write(codec, TAS2552_PDM_CFG, TAS2552_PDM_BCLK_SEL);
	377	snd_soc_write(codec, TAS2552_BOOST_PT_CTRL, TAS2552_APT_DELAY_200 \|
	378	TAS2552_APT_THRESH_2_1_7);
	379
	380	ret = regmap_register_patch(tas2552->regmap, tas2552_init_regs,
	381	ARRAY_SIZE(tas2552_init_regs));
	382	if (ret != 0) {
	383	dev_err(codec->dev, "Failed to write init registers: %d\n",
	384	ret);
	385	goto patch_fail;
	386	}
	387
a7a8e994 DM	388	snd_soc_write(codec, TAS2552_CFG_2, TAS2552_BOOST_EN \|
	389	TAS2552_APT_EN \| TAS2552_LIM_EN);
	390
	391	snd_soc_dapm_new_controls(dapm, tas2552_dapm_widgets,
	392	ARRAY_SIZE(tas2552_dapm_widgets));
	393	snd_soc_dapm_add_routes(dapm, tas2552_audio_map,
	394	ARRAY_SIZE(tas2552_audio_map));
	395
5df7f71d DM	396	return 0;
	397
	398	patch_fail:
	399	pm_runtime_put(codec->dev);
	400	probe_fail:
	401	if (tas2552->enable_gpio)
	402	gpiod_set_value(tas2552->enable_gpio, 0);
	403
	404	regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
	405	tas2552->supplies);
	406	return -EIO;
	407	}
	408
	409	static int tas2552_codec_remove(struct snd_soc_codec *codec)
	410	{
	411	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	412
e295a4a4 DM	413	pm_runtime_put(codec->dev);
e295a4a4 DM	414
5df7f71d DM	415	if (tas2552->enable_gpio)
	416	gpiod_set_value(tas2552->enable_gpio, 0);
	417
	418	return 0;
	419	};
	420
	421	#ifdef CONFIG_PM
	422	static int tas2552_suspend(struct snd_soc_codec *codec)
	423	{
	424	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	425	int ret;
	426
	427	ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
	428	tas2552->supplies);
	429
	430	if (ret != 0)
	431	dev_err(codec->dev, "Failed to disable supplies: %d\n",
	432	ret);
	433	return 0;
	434	}
	435
	436	static int tas2552_resume(struct snd_soc_codec *codec)
	437	{
	438	struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
	439	int ret;
	440
	441	ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
	442	tas2552->supplies);
	443
	444	if (ret != 0) {
	445	dev_err(codec->dev, "Failed to enable supplies: %d\n",
	446	ret);
	447	}
	448
	449	return 0;
	450	}
	451	#else
	452	#define tas2552_suspend NULL
	453	#define tas2552_resume NULL
	454	#endif
	455
	456	static struct snd_soc_codec_driver soc_codec_dev_tas2552 = {
	457	.probe = tas2552_codec_probe,
	458	.remove = tas2552_codec_remove,
	459	.suspend = tas2552_suspend,
	460	.resume = tas2552_resume,
	461	.controls = tas2552_snd_controls,
	462	.num_controls = ARRAY_SIZE(tas2552_snd_controls),
	463	};
	464
	465	static const struct regmap_config tas2552_regmap_config = {
	466	.reg_bits = 8,
	467	.val_bits = 8,
	468
	469	.max_register = TAS2552_MAX_REG,
	470	.reg_defaults = tas2552_reg_defs,
	471	.num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
	472	.cache_type = REGCACHE_RBTREE,
	473	};
	474
	475	static int tas2552_probe(struct i2c_client *client,
	476	const struct i2c_device_id *id)
	477	{
	478	struct device *dev;
479	struct tas2552_data *data;
480	int ret;
481	int i;
482
483	dev = &client->dev;
484	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
485	if (data == NULL)
486	return -ENOMEM;
487
488	data->enable_gpio = devm_gpiod_get(dev, "enable");
489	if (IS_ERR(data->enable_gpio)) {
490	ret = PTR_ERR(data->enable_gpio);
491	if (ret != -ENOENT && ret != -ENOSYS)
492	return ret;
493
494	data->enable_gpio = NULL;
495	} else {
496	gpiod_direction_output(data->enable_gpio, 0);
497	}
498
499	data->tas2552_client = client;
500	data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
501	if (IS_ERR(data->regmap)) {
502	ret = PTR_ERR(data->regmap);
503	dev_err(&client->dev, "Failed to allocate register map: %d\n",
504	ret);
505	return ret;
506	}
507
508	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
509	data->supplies[i].supply = tas2552_supply_names[i];
510
511	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
512	data->supplies);
c62f9d8f	513	if (ret != 0) {
5df7f71d	514	dev_err(dev, "Failed to request supplies: %d\n", ret);
c62f9d8f AL	515	return ret;
c62f9d8f AL	516	}
5df7f71d DM	517
	518	pm_runtime_set_active(&client->dev);
	519	pm_runtime_set_autosuspend_delay(&client->dev, 1000);
	520	pm_runtime_use_autosuspend(&client->dev);
	521	pm_runtime_enable(&client->dev);
	522	pm_runtime_mark_last_busy(&client->dev);
	523	pm_runtime_put_sync_autosuspend(&client->dev);
	524
	525	dev_set_drvdata(&client->dev, data);
	526
	527	ret = snd_soc_register_codec(&client->dev,
	528	&soc_codec_dev_tas2552,
	529	tas2552_dai, ARRAY_SIZE(tas2552_dai));
	530	if (ret < 0)
	531	dev_err(&client->dev, "Failed to register codec: %d\n", ret);
	532
c62f9d8f	533	return ret;
5df7f71d DM	534	}
	535
	536	static int tas2552_i2c_remove(struct i2c_client *client)
	537	{
	538	snd_soc_unregister_codec(&client->dev);
	539	return 0;
	540	}
	541
	542	static const struct i2c_device_id tas2552_id[] = {
	543	{ "tas2552", 0 },
	544	{ }
	545	};
	546	MODULE_DEVICE_TABLE(i2c, tas2552_id);
	547
	548	#if IS_ENABLED(CONFIG_OF)
	549	static const struct of_device_id tas2552_of_match[] = {
	550	{ .compatible = "ti,tas2552", },
	551	{},
	552	};
	553	MODULE_DEVICE_TABLE(of, tas2552_of_match);
	554	#endif
	555
	556	static struct i2c_driver tas2552_i2c_driver = {
	557	.driver = {
	558	.name = "tas2552",
	559	.owner = THIS_MODULE,
	560	.of_match_table = of_match_ptr(tas2552_of_match),
	561	.pm = &tas2552_pm,
	562	},
	563	.probe = tas2552_probe,
	564	.remove = tas2552_i2c_remove,
	565	.id_table = tas2552_id,
	566	};
	567
	568	module_i2c_driver(tas2552_i2c_driver);
	569
	570	MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
	571	MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
	572	MODULE_LICENSE("GPL");