[deliverable/linux.git] / sound / soc / codecs / pcm1681.c

/*
 * PCM1681 ASoC codec driver
 *
 * Copyright (c) StreamUnlimited GmbH 2013
 *	Marek Belisko <marek.belisko@streamunlimited.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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/slab.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>

#define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE  |		\
			     SNDRV_PCM_FMTBIT_S24_LE)

#define PCM1681_PCM_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 | SNDRV_PCM_RATE_192000)

#define PCM1681_SOFT_MUTE_ALL		0xff
#define PCM1681_DEEMPH_RATE_MASK	0x18
#define PCM1681_DEEMPH_MASK		0x01

#define PCM1681_ATT_CONTROL(X)	(X <= 6 ? X : X + 9) /* Attenuation level */
#define PCM1681_SOFT_MUTE	0x07	/* Soft mute control register */
#define PCM1681_DAC_CONTROL	0x08	/* DAC operation control */
#define PCM1681_FMT_CONTROL	0x09	/* Audio interface data format */
#define PCM1681_DEEMPH_CONTROL	0x0a	/* De-emphasis control */
#define PCM1681_ZERO_DETECT_STATUS	0x0e	/* Zero detect status reg */

static const struct reg_default pcm1681_reg_defaults[] = {
	{ 0x01,	0xff },
	{ 0x02,	0xff },
	{ 0x03,	0xff },
	{ 0x04,	0xff },
	{ 0x05,	0xff },
	{ 0x06,	0xff },
	{ 0x07,	0x00 },
	{ 0x08,	0x00 },
	{ 0x09,	0x06 },
	{ 0x0A,	0x00 },
	{ 0x0B,	0xff },
	{ 0x0C,	0x0f },
	{ 0x0D,	0x00 },
	{ 0x10,	0xff },
	{ 0x11,	0xff },
	{ 0x12,	0x00 },
	{ 0x13,	0x00 },
};

static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg)
{
	return !((reg == 0x00) || (reg == 0x0f));
}

static bool pcm1681_writeable_reg(struct device *dev, unsigned register reg)
{
	return pcm1681_accessible_reg(dev, reg) &&
		(reg != PCM1681_ZERO_DETECT_STATUS);
}

struct pcm1681_private {
	struct regmap *regmap;
	unsigned int format;
	/* Current deemphasis status */
	unsigned int deemph;
	/* Current rate for deemphasis control */
	unsigned int rate;
};

static const int pcm1681_deemph[] = { 44100, 48000, 32000 };

static int pcm1681_set_deemph(struct snd_soc_codec *codec)
{
	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
	int i = 0, val = -1, enable = 0;

	if (priv->deemph)
		for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++)
			if (pcm1681_deemph[i] == priv->rate)
				val = i;

	if (val != -1) {
		regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,
					PCM1681_DEEMPH_RATE_MASK, val);
		enable = 1;
	} else
		enable = 0;

	/* enable/disable deemphasis functionality */
	return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,
					PCM1681_DEEMPH_MASK, enable);
}

static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);

	ucontrol->value.enumerated.item[0] = priv->deemph;

	return 0;
}

static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);

	priv->deemph = ucontrol->value.enumerated.item[0];

	return pcm1681_set_deemph(codec);
}

static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai,
			      unsigned int format)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);

	/* The PCM1681 can only be slave to all clocks */
	if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
		dev_err(codec->dev, "Invalid clocking mode\n");
		return -EINVAL;
	}

	priv->format = format;

	return 0;
}

static int pcm1681_digital_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
	int val;

	if (mute)
		val = PCM1681_SOFT_MUTE_ALL;
	else
		val = 0;

	return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val);
}

static int pcm1681_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 pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
	int val = 0, ret;
	int pcm_format = params_format(params);

	priv->rate = params_rate(params);

	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_RIGHT_J:
		if (pcm_format == SNDRV_PCM_FORMAT_S24_LE)
			val = 0x00;
		else if (pcm_format == SNDRV_PCM_FORMAT_S16_LE)
			val = 0x03;
		break;
	case SND_SOC_DAIFMT_I2S:
		val = 0x04;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		val = 0x05;
		break;
	default:
		dev_err(codec->dev, "Invalid DAI format\n");
		return -EINVAL;
	}

	ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val);
	if (ret < 0)
		return ret;

	return pcm1681_set_deemph(codec);
}

static const struct snd_soc_dai_ops pcm1681_dai_ops = {
	.set_fmt	= pcm1681_set_dai_fmt,
	.hw_params	= pcm1681_hw_params,
	.digital_mute	= pcm1681_digital_mute,
};

static const struct snd_soc_dapm_widget pcm1681_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("VOUT1"),
SND_SOC_DAPM_OUTPUT("VOUT2"),
SND_SOC_DAPM_OUTPUT("VOUT3"),
SND_SOC_DAPM_OUTPUT("VOUT4"),
SND_SOC_DAPM_OUTPUT("VOUT5"),
SND_SOC_DAPM_OUTPUT("VOUT6"),
SND_SOC_DAPM_OUTPUT("VOUT7"),
SND_SOC_DAPM_OUTPUT("VOUT8"),
};

static const struct snd_soc_dapm_route pcm1681_dapm_routes[] = {
	{ "VOUT1", NULL, "Playback" },
	{ "VOUT2", NULL, "Playback" },
	{ "VOUT3", NULL, "Playback" },
	{ "VOUT4", NULL, "Playback" },
	{ "VOUT5", NULL, "Playback" },
	{ "VOUT6", NULL, "Playback" },
	{ "VOUT7", NULL, "Playback" },
	{ "VOUT8", NULL, "Playback" },
};

static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1);

static const struct snd_kcontrol_new pcm1681_controls[] = {
	SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume",
			PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0,
			0x7f, 0, pcm1681_dac_tlv),
	SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume",
			PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0,
			0x7f, 0, pcm1681_dac_tlv),
	SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume",
			PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0,
			0x7f, 0, pcm1681_dac_tlv),
	SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume",
			PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0,
			0x7f, 0, pcm1681_dac_tlv),
	SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
			    pcm1681_get_deemph, pcm1681_put_deemph),
};

static struct snd_soc_dai_driver pcm1681_dai = {
	.name = "pcm1681-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 8,
		.rates = PCM1681_PCM_RATES,
		.formats = PCM1681_PCM_FORMATS,
	},
	.ops = &pcm1681_dai_ops,
};

#ifdef CONFIG_OF
static const struct of_device_id pcm1681_dt_ids[] = {
	{ .compatible = "ti,pcm1681", },
	{ }
};
MODULE_DEVICE_TABLE(of, pcm1681_dt_ids);
#endif

static const struct regmap_config pcm1681_regmap = {
	.reg_bits		= 8,
	.val_bits		= 8,
	.max_register		= ARRAY_SIZE(pcm1681_reg_defaults) + 1,
	.reg_defaults		= pcm1681_reg_defaults,
	.num_reg_defaults	= ARRAY_SIZE(pcm1681_reg_defaults),
	.writeable_reg		= pcm1681_writeable_reg,
	.readable_reg		= pcm1681_accessible_reg,
};

static struct snd_soc_codec_driver soc_codec_dev_pcm1681 = {
	.controls		= pcm1681_controls,
	.num_controls		= ARRAY_SIZE(pcm1681_controls),
	.dapm_widgets		= pcm1681_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(pcm1681_dapm_widgets),
	.dapm_routes		= pcm1681_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(pcm1681_dapm_routes),
};

static const struct i2c_device_id pcm1681_i2c_id[] = {
	{"pcm1681", 0},
	{}
};
MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id);

static int pcm1681_i2c_probe(struct i2c_client *client,
			      const struct i2c_device_id *id)
{
	int ret;
	struct pcm1681_private *priv;

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

	priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap);
	if (IS_ERR(priv->regmap)) {
		ret = PTR_ERR(priv->regmap);
		dev_err(&client->dev, "Failed to create regmap: %d\n", ret);
		return ret;
	}

	i2c_set_clientdata(client, priv);

	return snd_soc_register_codec(&client->dev, &soc_codec_dev_pcm1681,
		&pcm1681_dai, 1);
}

static int pcm1681_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	return 0;
}

static struct i2c_driver pcm1681_i2c_driver = {
	.driver = {
		.name	= "pcm1681",
		.owner	= THIS_MODULE,
		.of_match_table = of_match_ptr(pcm1681_dt_ids),
	},
	.id_table	= pcm1681_i2c_id,
	.probe		= pcm1681_i2c_probe,
	.remove		= pcm1681_i2c_remove,
};

module_i2c_driver(pcm1681_i2c_driver);

MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver");
MODULE_AUTHOR("Marek Belisko <marek.belisko@streamunlimited.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
95169d08 MB	1	/*
	2	* PCM1681 ASoC codec driver
	3	*
	4	* Copyright (c) StreamUnlimited GmbH 2013
	5	* Marek Belisko <marek.belisko@streamunlimited.com>
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* as published by the Free Software Foundation; either version 2
	10	* of the License, or (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17
	18	#include <linux/module.h>
	19	#include <linux/slab.h>
	20	#include <linux/delay.h>
	21	#include <linux/gpio.h>
	22	#include <linux/i2c.h>
	23	#include <linux/regmap.h>
	24	#include <linux/of_device.h>
	25	#include <linux/of_gpio.h>
	26	#include <sound/pcm.h>
	27	#include <sound/pcm_params.h>
	28	#include <sound/soc.h>
	29	#include <sound/tlv.h>
	30
	31	#define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| \
	32	SNDRV_PCM_FMTBIT_S24_LE)
	33
	34	#define PCM1681_PCM_RATES (SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_16000 \| \
	35	SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	36	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| \
	37	SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_192000)
	38
	39	#define PCM1681_SOFT_MUTE_ALL 0xff
	40	#define PCM1681_DEEMPH_RATE_MASK 0x18
	41	#define PCM1681_DEEMPH_MASK 0x01
	42
	43	#define PCM1681_ATT_CONTROL(X) (X <= 6 ? X : X + 9) /* Attenuation level */
	44	#define PCM1681_SOFT_MUTE 0x07 /* Soft mute control register */
	45	#define PCM1681_DAC_CONTROL 0x08 /* DAC operation control */
	46	#define PCM1681_FMT_CONTROL 0x09 /* Audio interface data format */
	47	#define PCM1681_DEEMPH_CONTROL 0x0a /* De-emphasis control */
	48	#define PCM1681_ZERO_DETECT_STATUS 0x0e /* Zero detect status reg */
	49
	50	static const struct reg_default pcm1681_reg_defaults[] = {
	51	{ 0x01, 0xff },
	52	{ 0x02, 0xff },
	53	{ 0x03, 0xff },
	54	{ 0x04, 0xff },
	55	{ 0x05, 0xff },
	56	{ 0x06, 0xff },
	57	{ 0x07, 0x00 },
	58	{ 0x08, 0x00 },
	59	{ 0x09, 0x06 },
	60	{ 0x0A, 0x00 },
	61	{ 0x0B, 0xff },
	62	{ 0x0C, 0x0f },
	63	{ 0x0D, 0x00 },
	64	{ 0x10, 0xff },
65	{ 0x11, 0xff },
66	{ 0x12, 0x00 },
67	{ 0x13, 0x00 },
68	};
69
70	static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg)
71	{
72	return !((reg == 0x00) \|\| (reg == 0x0f));
73	}
74
75	static bool pcm1681_writeable_reg(struct device *dev, unsigned register reg)
76	{
77	return pcm1681_accessible_reg(dev, reg) &&
78	(reg != PCM1681_ZERO_DETECT_STATUS);
79	}
80
81	struct pcm1681_private {
82	struct regmap *regmap;
83	unsigned int format;
84	/* Current deemphasis status */
85	unsigned int deemph;
86	/* Current rate for deemphasis control */
87	unsigned int rate;
88	};
89
90	static const int pcm1681_deemph[] = { 44100, 48000, 32000 };
91
92	static int pcm1681_set_deemph(struct snd_soc_codec *codec)
93	{
94	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
95	int i = 0, val = -1, enable = 0;
96
97	if (priv->deemph)
98	for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++)
99	if (pcm1681_deemph[i] == priv->rate)
100	val = i;
101
102	if (val != -1) {
103	regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,
104	PCM1681_DEEMPH_RATE_MASK, val);
105	enable = 1;
106	} else
107	enable = 0;
108
109	/* enable/disable deemphasis functionality */
110	return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,
111	PCM1681_DEEMPH_MASK, enable);
112	}
113
114	static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol,
115	struct snd_ctl_elem_value *ucontrol)
116	{
117	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
118	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
119
120	ucontrol->value.enumerated.item[0] = priv->deemph;
121
122	return 0;
123	}
124
125	static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol,
126	struct snd_ctl_elem_value *ucontrol)
127	{
128	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
129	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
130
131	priv->deemph = ucontrol->value.enumerated.item[0];
132
133	return pcm1681_set_deemph(codec);
134	}
135
136	static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai,
137	unsigned int format)
138	{
139	struct snd_soc_codec *codec = codec_dai->codec;
140	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
141
142	/* The PCM1681 can only be slave to all clocks */
143	if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
144	dev_err(codec->dev, "Invalid clocking mode\n");
145	return -EINVAL;
146	}
147
148	priv->format = format;
149
150	return 0;
151	}
152
153	static int pcm1681_digital_mute(struct snd_soc_dai *dai, int mute)
154	{
155	struct snd_soc_codec *codec = dai->codec;
156	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
157	int val;
158
159	if (mute)
160	val = PCM1681_SOFT_MUTE_ALL;
161	else
162	val = 0;
163
164	return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val);
165	}
166
167	static int pcm1681_hw_params(struct snd_pcm_substream *substream,
168	struct snd_pcm_hw_params *params,
169	struct snd_soc_dai *dai)
170	{
171	struct snd_soc_codec *codec = dai->codec;
172	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
173	int val = 0, ret;
174	int pcm_format = params_format(params);
175
176	priv->rate = params_rate(params);
177
178	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
179	case SND_SOC_DAIFMT_RIGHT_J:
180	if (pcm_format == SNDRV_PCM_FORMAT_S24_LE)
181	val = 0x00;
182	else if (pcm_format == SNDRV_PCM_FORMAT_S16_LE)
183	val = 0x03;
184	break;
185	case SND_SOC_DAIFMT_I2S:
186	val = 0x04;
187	break;
188	case SND_SOC_DAIFMT_LEFT_J:
189	val = 0x05;
190	break;
191	default:
192	dev_err(codec->dev, "Invalid DAI format\n");
193	return -EINVAL;
194	}
195
196	ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val);
197	if (ret < 0)
198	return ret;
199
200	return pcm1681_set_deemph(codec);
201	}
202
203	static const struct snd_soc_dai_ops pcm1681_dai_ops = {
204	.set_fmt = pcm1681_set_dai_fmt,
205	.hw_params = pcm1681_hw_params,
206	.digital_mute = pcm1681_digital_mute,
207	};
208
b9281f99 MB	209	static const struct snd_soc_dapm_widget pcm1681_dapm_widgets[] = {
	210	SND_SOC_DAPM_OUTPUT("VOUT1"),
	211	SND_SOC_DAPM_OUTPUT("VOUT2"),
	212	SND_SOC_DAPM_OUTPUT("VOUT3"),
	213	SND_SOC_DAPM_OUTPUT("VOUT4"),
	214	SND_SOC_DAPM_OUTPUT("VOUT5"),
	215	SND_SOC_DAPM_OUTPUT("VOUT6"),
	216	SND_SOC_DAPM_OUTPUT("VOUT7"),
	217	SND_SOC_DAPM_OUTPUT("VOUT8"),
	218	};
	219
	220	static const struct snd_soc_dapm_route pcm1681_dapm_routes[] = {
	221	{ "VOUT1", NULL, "Playback" },
	222	{ "VOUT2", NULL, "Playback" },
	223	{ "VOUT3", NULL, "Playback" },
	224	{ "VOUT4", NULL, "Playback" },
	225	{ "VOUT5", NULL, "Playback" },
	226	{ "VOUT6", NULL, "Playback" },
	227	{ "VOUT7", NULL, "Playback" },
	228	{ "VOUT8", NULL, "Playback" },
	229	};
	230
95169d08 MB	231	static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1);
	232
	233	static const struct snd_kcontrol_new pcm1681_controls[] = {
	234	SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume",
	235	PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0,
	236	0x7f, 0, pcm1681_dac_tlv),
	237	SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume",
	238	PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0,
	239	0x7f, 0, pcm1681_dac_tlv),
	240	SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume",
	241	PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0,
	242	0x7f, 0, pcm1681_dac_tlv),
	243	SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume",
	244	PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0,
	245	0x7f, 0, pcm1681_dac_tlv),
	246	SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
	247	pcm1681_get_deemph, pcm1681_put_deemph),
	248	};
	249
16695971	250	static struct snd_soc_dai_driver pcm1681_dai = {
95169d08 MB	251	.name = "pcm1681-hifi",
	252	.playback = {
	253	.stream_name = "Playback",
	254	.channels_min = 2,
	255	.channels_max = 8,
	256	.rates = PCM1681_PCM_RATES,
	257	.formats = PCM1681_PCM_FORMATS,
	258	},
	259	.ops = &pcm1681_dai_ops,
	260	};
	261
	262	#ifdef CONFIG_OF
	263	static const struct of_device_id pcm1681_dt_ids[] = {
	264	{ .compatible = "ti,pcm1681", },
	265	{ }
	266	};
	267	MODULE_DEVICE_TABLE(of, pcm1681_dt_ids);
	268	#endif
	269
	270	static const struct regmap_config pcm1681_regmap = {
	271	.reg_bits = 8,
	272	.val_bits = 8,
	273	.max_register = ARRAY_SIZE(pcm1681_reg_defaults) + 1,
	274	.reg_defaults = pcm1681_reg_defaults,
	275	.num_reg_defaults = ARRAY_SIZE(pcm1681_reg_defaults),
	276	.writeable_reg = pcm1681_writeable_reg,
	277	.readable_reg = pcm1681_accessible_reg,
	278	};
	279
	280	static struct snd_soc_codec_driver soc_codec_dev_pcm1681 = {
	281	.controls = pcm1681_controls,
	282	.num_controls = ARRAY_SIZE(pcm1681_controls),
b9281f99 MB	283	.dapm_widgets = pcm1681_dapm_widgets,
	284	.num_dapm_widgets = ARRAY_SIZE(pcm1681_dapm_widgets),
	285	.dapm_routes = pcm1681_dapm_routes,
	286	.num_dapm_routes = ARRAY_SIZE(pcm1681_dapm_routes),
95169d08 MB	287	};
	288
	289	static const struct i2c_device_id pcm1681_i2c_id[] = {
	290	{"pcm1681", 0},
	291	{}
	292	};
	293	MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id);
	294
	295	static int pcm1681_i2c_probe(struct i2c_client *client,
	296	const struct i2c_device_id *id)
	297	{
	298	int ret;
	299	struct pcm1681_private *priv;
	300
	301	priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
	302	if (!priv)
	303	return -ENOMEM;
	304
	305	priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap);
	306	if (IS_ERR(priv->regmap)) {
	307	ret = PTR_ERR(priv->regmap);
	308	dev_err(&client->dev, "Failed to create regmap: %d\n", ret);
	309	return ret;
	310	}
	311
	312	i2c_set_clientdata(client, priv);
	313
	314	return snd_soc_register_codec(&client->dev, &soc_codec_dev_pcm1681,
	315	&pcm1681_dai, 1);
	316	}
	317
	318	static int pcm1681_i2c_remove(struct i2c_client *client)
	319	{
	320	snd_soc_unregister_codec(&client->dev);
	321	return 0;
	322	}
	323
	324	static struct i2c_driver pcm1681_i2c_driver = {
	325	.driver = {
	326	.name = "pcm1681",
	327	.owner = THIS_MODULE,
	328	.of_match_table = of_match_ptr(pcm1681_dt_ids),
	329	},
	330	.id_table = pcm1681_i2c_id,
	331	.probe = pcm1681_i2c_probe,
	332	.remove = pcm1681_i2c_remove,
	333	};
	334
	335	module_i2c_driver(pcm1681_i2c_driver);
	336
	337	MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver");
	338	MODULE_AUTHOR("Marek Belisko <marek.belisko@streamunlimited.com>");
	339	MODULE_LICENSE("GPL");