[deliverable/linux.git] / sound / soc / codecs / max9850.c

/*
 * max9850.c  --  codec driver for max9850
 *
 * Copyright (C) 2011 taskit GmbH
 *
 * Author: Christian Glindkamp <christian.glindkamp@taskit.de>
 *
 * Initial development of this code was funded by
 * MICRONIC Computer Systeme GmbH, http://www.mcsberlin.de/
 *
 * 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.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>

#include "max9850.h"

struct max9850_priv {
	struct regmap *regmap;
	unsigned int sysclk;
};

/* max9850 register cache */
static const struct reg_default max9850_reg[] = {
	{  2, 0x0c },
	{  3, 0x00 },
	{  4, 0x00 },
	{  5, 0x00 },
	{  6, 0x00 },
	{  7, 0x00 },
	{  8, 0x00 },
	{  9, 0x00 },
	{ 10, 0x00 },
};

/* these registers are not used at the moment but provided for the sake of
 * completeness */
static bool max9850_volatile_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case MAX9850_STATUSA:
	case MAX9850_STATUSB:
		return 1;
	default:
		return 0;
	}
}

static const struct regmap_config max9850_regmap = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = MAX9850_DIGITAL_AUDIO,
	.volatile_reg = max9850_volatile_register,
	.cache_type = REGCACHE_RBTREE,
};

static const unsigned int max9850_tlv[] = {
	TLV_DB_RANGE_HEAD(4),
	0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
	0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
	0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
	0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0),
};

static const struct snd_kcontrol_new max9850_controls[] = {
SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
};

static const struct snd_kcontrol_new max9850_mixer_controls[] = {
	SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
};

static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
		&max9850_mixer_controls[0],
		ARRAY_SIZE(max9850_mixer_controls)),
SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
SND_SOC_DAPM_OUTPUT("OUTL"),
SND_SOC_DAPM_OUTPUT("HPL"),
SND_SOC_DAPM_OUTPUT("OUTR"),
SND_SOC_DAPM_OUTPUT("HPR"),
SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_INPUT("INL"),
SND_SOC_DAPM_INPUT("INR"),
};

static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
	/* output mixer */
	{"Output Mixer", NULL, "DAC"},
	{"Output Mixer", "Line In Switch", "Line Input"},

	/* outputs */
	{"Headphone Output", NULL, "Output Mixer"},
	{"HPL", NULL, "Headphone Output"},
	{"HPR", NULL, "Headphone Output"},
	{"OUTL", NULL, "Output Mixer"},
	{"OUTR", NULL, "Output Mixer"},

	/* inputs */
	{"Line Input", NULL, "INL"},
	{"Line Input", NULL, "INR"},

	/* supplies */
	{"Output Mixer", NULL, "Charge Pump 1"},
	{"Output Mixer", NULL, "Charge Pump 2"},
	{"Output Mixer", NULL, "SHDN"},
	{"DAC", NULL, "MCLK"},
};

static int max9850_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 max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
	u64 lrclk_div;
	u8 sf, da;

	if (!max9850->sysclk)
		return -EINVAL;

	/* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
	sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1;
	lrclk_div = (1 << 22);
	lrclk_div *= params_rate(params);
	lrclk_div *= sf;
	do_div(lrclk_div, max9850->sysclk);

	snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
	snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff);

	switch (params_width(params)) {
	case 16:
		da = 0;
		break;
	case 20:
		da = 0x2;
		break;
	case 24:
		da = 0x3;
		break;
	default:
		return -EINVAL;
	}
	snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da);

	return 0;
}

static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,
		int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);

	/* calculate mclk -> iclk divider */
	if (freq <= 13000000)
		snd_soc_write(codec, MAX9850_CLOCK, 0x0);
	else if (freq <= 26000000)
		snd_soc_write(codec, MAX9850_CLOCK, 0x4);
	else if (freq <= 40000000)
		snd_soc_write(codec, MAX9850_CLOCK, 0x8);
	else
		return -EINVAL;

	max9850->sysclk = freq;
	return 0;
}

static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u8 da = 0;

	/* set master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		da |= MAX9850_MASTER;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	/* interface format */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		da |= MAX9850_DLY;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		da |= MAX9850_RTJ;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		break;
	default:
		return -EINVAL;
	}

	/* clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_IB_IF:
		da |= MAX9850_BCINV | MAX9850_INV;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		da |= MAX9850_BCINV;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		da |= MAX9850_INV;
		break;
	default:
		return -EINVAL;
	}

	/* set da */
	snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da);

	return 0;
}

static int max9850_set_bias_level(struct snd_soc_codec *codec,
				  enum snd_soc_bias_level level)
{
	struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
	int ret;

	switch (level) {
	case SND_SOC_BIAS_ON:
		break;
	case SND_SOC_BIAS_PREPARE:
		break;
	case SND_SOC_BIAS_STANDBY:
		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
			ret = regcache_sync(max9850->regmap);
			if (ret) {
				dev_err(codec->dev,
					"Failed to sync cache: %d\n", ret);
				return ret;
			}
		}
		break;
	case SND_SOC_BIAS_OFF:
		break;
	}
	codec->dapm.bias_level = level;
	return 0;
}

#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000

#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
	SNDRV_PCM_FMTBIT_S24_LE)

static const struct snd_soc_dai_ops max9850_dai_ops = {
	.hw_params	= max9850_hw_params,
	.set_sysclk	= max9850_set_dai_sysclk,
	.set_fmt	= max9850_set_dai_fmt,
};

static struct snd_soc_dai_driver max9850_dai = {
	.name = "max9850-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = MAX9850_RATES,
		.formats = MAX9850_FORMATS
	},
	.ops = &max9850_dai_ops,
};

#ifdef CONFIG_PM
static int max9850_suspend(struct snd_soc_codec *codec)
{
	max9850_set_bias_level(codec, SND_SOC_BIAS_OFF);

	return 0;
}

static int max9850_resume(struct snd_soc_codec *codec)
{
	max9850_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	return 0;
}
#else
#define max9850_suspend NULL
#define max9850_resume NULL
#endif

static int max9850_probe(struct snd_soc_codec *codec)
{
	/* enable zero-detect */
	snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1);
	/* enable slew-rate control */
	snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40);
	/* set slew-rate 125ms */
	snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0);

	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_max9850 = {
	.probe =	max9850_probe,
	.suspend =	max9850_suspend,
	.resume =	max9850_resume,
	.set_bias_level = max9850_set_bias_level,

	.controls = max9850_controls,
	.num_controls = ARRAY_SIZE(max9850_controls),
	.dapm_widgets = max9850_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),
	.dapm_routes = max9850_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),
};

static int max9850_i2c_probe(struct i2c_client *i2c,
			     const struct i2c_device_id *id)
{
	struct max9850_priv *max9850;
	int ret;

	max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),
			       GFP_KERNEL);
	if (max9850 == NULL)
		return -ENOMEM;

	max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
	if (IS_ERR(max9850->regmap))
		return PTR_ERR(max9850->regmap);

	i2c_set_clientdata(i2c, max9850);

	ret = snd_soc_register_codec(&i2c->dev,
			&soc_codec_dev_max9850, &max9850_dai, 1);
	return ret;
}

static int max9850_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	return 0;
}

static const struct i2c_device_id max9850_i2c_id[] = {
	{ "max9850", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);

static struct i2c_driver max9850_i2c_driver = {
	.driver = {
		.name = "max9850",
		.owner = THIS_MODULE,
	},
	.probe = max9850_i2c_probe,
	.remove = max9850_i2c_remove,
	.id_table = max9850_i2c_id,
};

module_i2c_driver(max9850_i2c_driver);

MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
0e45cab6 CG	1	/*
	2	* max9850.c -- codec driver for max9850
	3	*
	4	* Copyright (C) 2011 taskit GmbH
	5	*
	6	* Author: Christian Glindkamp <christian.glindkamp@taskit.de>
	7	*
	8	* Initial development of this code was funded by
	9	* MICRONIC Computer Systeme GmbH, http://www.mcsberlin.de/
	10	*
	11	* This program is free software; you can redistribute it and/or modify it
	12	* under the terms of the GNU General Public License as published by the
	13	* Free Software Foundation; either version 2 of the License, or (at your
	14	* option) any later version.
	15	*
	16	*/
	17
	18	#include <linux/module.h>
	19	#include <linux/init.h>
	20	#include <linux/i2c.h>
06841662	21	#include <linux/regmap.h>
0e45cab6 CG	22	#include <linux/slab.h>
	23	#include <sound/pcm.h>
	24	#include <sound/pcm_params.h>
	25	#include <sound/soc.h>
	26	#include <sound/tlv.h>
	27
	28	#include "max9850.h"
	29
	30	struct max9850_priv {
06841662	31	struct regmap *regmap;
0e45cab6 CG	32	unsigned int sysclk;
	33	};
	34
	35	/* max9850 register cache */
06841662 MB	36	static const struct reg_default max9850_reg[] = {
	37	{ 2, 0x0c },
	38	{ 3, 0x00 },
	39	{ 4, 0x00 },
	40	{ 5, 0x00 },
	41	{ 6, 0x00 },
	42	{ 7, 0x00 },
	43	{ 8, 0x00 },
	44	{ 9, 0x00 },
	45	{ 10, 0x00 },
0e45cab6 CG	46	};
	47
	48	/* these registers are not used at the moment but provided for the sake of
	49	* completeness */
06841662	50	static bool max9850_volatile_register(struct device *dev, unsigned int reg)
0e45cab6 CG	51	{
	52	switch (reg) {
	53	case MAX9850_STATUSA:
	54	case MAX9850_STATUSB:
	55	return 1;
	56	default:
	57	return 0;
	58	}
	59	}
	60
06841662 MB	61	static const struct regmap_config max9850_regmap = {
	62	.reg_bits = 8,
	63	.val_bits = 8,
	64
	65	.max_register = MAX9850_DIGITAL_AUDIO,
	66	.volatile_reg = max9850_volatile_register,
	67	.cache_type = REGCACHE_RBTREE,
	68	};
	69
0e45cab6 CG	70	static const unsigned int max9850_tlv[] = {
	71	TLV_DB_RANGE_HEAD(4),
	72	0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
	73	0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
	74	0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
	75	0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0),
	76	};
	77
	78	static const struct snd_kcontrol_new max9850_controls[] = {
	79	SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
	80	SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
	81	SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
	82	};
	83
	84	static const struct snd_kcontrol_new max9850_mixer_controls[] = {
	85	SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
	86	};
	87
	88	static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
	89	SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
	90	SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
	91	SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
	92	SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
	93	SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
	94	&max9850_mixer_controls[0],
	95	ARRAY_SIZE(max9850_mixer_controls)),
	96	SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
	97	SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
	98	SND_SOC_DAPM_OUTPUT("OUTL"),
	99	SND_SOC_DAPM_OUTPUT("HPL"),
	100	SND_SOC_DAPM_OUTPUT("OUTR"),
	101	SND_SOC_DAPM_OUTPUT("HPR"),
	102	SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
	103	SND_SOC_DAPM_INPUT("INL"),
	104	SND_SOC_DAPM_INPUT("INR"),
	105	};
	106
5ee65ec6	107	static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
0e45cab6 CG	108	/* output mixer */
	109	{"Output Mixer", NULL, "DAC"},
	110	{"Output Mixer", "Line In Switch", "Line Input"},
	111
	112	/* outputs */
	113	{"Headphone Output", NULL, "Output Mixer"},
	114	{"HPL", NULL, "Headphone Output"},
	115	{"HPR", NULL, "Headphone Output"},
	116	{"OUTL", NULL, "Output Mixer"},
	117	{"OUTR", NULL, "Output Mixer"},
	118
	119	/* inputs */
	120	{"Line Input", NULL, "INL"},
	121	{"Line Input", NULL, "INR"},
	122
	123	/* supplies */
	124	{"Output Mixer", NULL, "Charge Pump 1"},
	125	{"Output Mixer", NULL, "Charge Pump 2"},
	126	{"Output Mixer", NULL, "SHDN"},
	127	{"DAC", NULL, "MCLK"},
	128	};
	129
	130	static int max9850_hw_params(struct snd_pcm_substream *substream,
	131	struct snd_pcm_hw_params *params,
	132	struct snd_soc_dai *dai)
	133	{
	134	struct snd_soc_codec *codec = dai->codec;
	135	struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
	136	u64 lrclk_div;
	137	u8 sf, da;
	138
27380fb8	139	if (!max9850->sysclk)
0e45cab6 CG	140	return -EINVAL;
	141
	142	/* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
	143	sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1;
	144	lrclk_div = (1 << 22);
	145	lrclk_div *= params_rate(params);
	146	lrclk_div *= sf;
	147	do_div(lrclk_div, max9850->sysclk);
	148
	149	snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
	150	snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
	151
0058e459 MB	152	switch (params_width(params)) {
0058e459 MB	153	case 16:
0e45cab6 CG	154	da = 0;
0e45cab6 CG	155	break;
0058e459	156	case 20:
0e45cab6 CG	157	da = 0x2;
0e45cab6 CG	158	break;
0058e459	159	case 24:
0e45cab6 CG	160	da = 0x3;
	161	break;
	162	default:
	163	return -EINVAL;
	164	}
	165	snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da);
	166
	167	return 0;
	168	}
	169
	170	static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	171	int clk_id, unsigned int freq, int dir)
	172	{
	173	struct snd_soc_codec *codec = codec_dai->codec;
	174	struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
	175
	176	/* calculate mclk -> iclk divider */
	177	if (freq <= 13000000)
	178	snd_soc_write(codec, MAX9850_CLOCK, 0x0);
	179	else if (freq <= 26000000)
	180	snd_soc_write(codec, MAX9850_CLOCK, 0x4);
	181	else if (freq <= 40000000)
	182	snd_soc_write(codec, MAX9850_CLOCK, 0x8);
	183	else
	184	return -EINVAL;
	185
	186	max9850->sysclk = freq;
	187	return 0;
	188	}
	189
	190	static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
	191	{
	192	struct snd_soc_codec *codec = codec_dai->codec;
	193	u8 da = 0;
	194
	195	/* set master/slave audio interface */
	196	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	197	case SND_SOC_DAIFMT_CBM_CFM:
	198	da \|= MAX9850_MASTER;
	199	break;
	200	case SND_SOC_DAIFMT_CBS_CFS:
	201	break;
	202	default:
	203	return -EINVAL;
	204	}
	205
	206	/* interface format */
	207	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	208	case SND_SOC_DAIFMT_I2S:
	209	da \|= MAX9850_DLY;
	210	break;
	211	case SND_SOC_DAIFMT_RIGHT_J:
	212	da \|= MAX9850_RTJ;
	213	break;
	214	case SND_SOC_DAIFMT_LEFT_J:
	215	break;
	216	default:
	217	return -EINVAL;
	218	}
	219
	220	/* clock inversion */
	221	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	222	case SND_SOC_DAIFMT_NB_NF:
	223	break;
224	case SND_SOC_DAIFMT_IB_IF:
225	da \|= MAX9850_BCINV \| MAX9850_INV;
226	break;
227	case SND_SOC_DAIFMT_IB_NF:
228	da \|= MAX9850_BCINV;
229	break;
230	case SND_SOC_DAIFMT_NB_IF:
231	da \|= MAX9850_INV;
232	break;
233	default:
234	return -EINVAL;
235	}
236
237	/* set da */
238	snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da);
239
240	return 0;
241	}
242
243	static int max9850_set_bias_level(struct snd_soc_codec *codec,
244	enum snd_soc_bias_level level)
245	{
06841662	246	struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
0e45cab6 CG	247	int ret;
	248
	249	switch (level) {
	250	case SND_SOC_BIAS_ON:
	251	break;
	252	case SND_SOC_BIAS_PREPARE:
	253	break;
	254	case SND_SOC_BIAS_STANDBY:
	255	if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
06841662	256	ret = regcache_sync(max9850->regmap);
0e45cab6 CG	257	if (ret) {
	258	dev_err(codec->dev,
	259	"Failed to sync cache: %d\n", ret);
	260	return ret;
	261	}
	262	}
	263	break;
	264	case SND_SOC_BIAS_OFF:
	265	break;
	266	}
	267	codec->dapm.bias_level = level;
	268	return 0;
	269	}
	270
	271	#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
	272
	273	#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	274	SNDRV_PCM_FMTBIT_S24_LE)
	275
85e7652d	276	static const struct snd_soc_dai_ops max9850_dai_ops = {
0e45cab6 CG	277	.hw_params = max9850_hw_params,
	278	.set_sysclk = max9850_set_dai_sysclk,
	279	.set_fmt = max9850_set_dai_fmt,
	280	};
	281
	282	static struct snd_soc_dai_driver max9850_dai = {
	283	.name = "max9850-hifi",
	284	.playback = {
	285	.stream_name = "Playback",
	286	.channels_min = 1,
	287	.channels_max = 2,
	288	.rates = MAX9850_RATES,
	289	.formats = MAX9850_FORMATS
	290	},
	291	.ops = &max9850_dai_ops,
	292	};
	293
	294	#ifdef CONFIG_PM
84b315ee	295	static int max9850_suspend(struct snd_soc_codec *codec)
0e45cab6 CG	296	{
	297	max9850_set_bias_level(codec, SND_SOC_BIAS_OFF);
	298
	299	return 0;
	300	}
	301
	302	static int max9850_resume(struct snd_soc_codec *codec)
	303	{
	304	max9850_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	305
	306	return 0;
	307	}
	308	#else
	309	#define max9850_suspend NULL
	310	#define max9850_resume NULL
	311	#endif
	312
	313	static int max9850_probe(struct snd_soc_codec *codec)
	314	{
0e45cab6 CG	315	/* enable zero-detect */
	316	snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1);
	317	/* enable slew-rate control */
	318	snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40);
	319	/* set slew-rate 125ms */
	320	snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
	321
0e45cab6 CG	322	return 0;
	323	}
	324
	325	static struct snd_soc_codec_driver soc_codec_dev_max9850 = {
	326	.probe = max9850_probe,
	327	.suspend = max9850_suspend,
	328	.resume = max9850_resume,
	329	.set_bias_level = max9850_set_bias_level,
5ee65ec6 AL	330
	331	.controls = max9850_controls,
	332	.num_controls = ARRAY_SIZE(max9850_controls),
	333	.dapm_widgets = max9850_dapm_widgets,
	334	.num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),
	335	.dapm_routes = max9850_dapm_routes,
	336	.num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),
0e45cab6 CG	337	};
0e45cab6 CG	338
7a79e94e BP	339	static int max9850_i2c_probe(struct i2c_client *i2c,
7a79e94e BP	340	const struct i2c_device_id *id)
0e45cab6 CG	341	{
	342	struct max9850_priv *max9850;
	343	int ret;
	344
bf791bdb AL	345	max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),
bf791bdb AL	346	GFP_KERNEL);
0e45cab6 CG	347	if (max9850 == NULL)
	348	return -ENOMEM;
	349
06841662 MB	350	max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
	351	if (IS_ERR(max9850->regmap))
	352	return PTR_ERR(max9850->regmap);
	353
0e45cab6 CG	354	i2c_set_clientdata(i2c, max9850);
	355
	356	ret = snd_soc_register_codec(&i2c->dev,
	357	&soc_codec_dev_max9850, &max9850_dai, 1);
0e45cab6 CG	358	return ret;
	359	}
	360
7a79e94e	361	static int max9850_i2c_remove(struct i2c_client *client)
0e45cab6 CG	362	{
0e45cab6 CG	363	snd_soc_unregister_codec(&client->dev);
0e45cab6 CG	364	return 0;
	365	}
	366
	367	static const struct i2c_device_id max9850_i2c_id[] = {
	368	{ "max9850", 0 },
	369	{ }
	370	};
	371	MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
	372
	373	static struct i2c_driver max9850_i2c_driver = {
	374	.driver = {
	375	.name = "max9850",
	376	.owner = THIS_MODULE,
	377	},
	378	.probe = max9850_i2c_probe,
7a79e94e	379	.remove = max9850_i2c_remove,
0e45cab6 CG	380	.id_table = max9850_i2c_id,
	381	};
	382
4abdc8c8	383	module_i2c_driver(max9850_i2c_driver);
0e45cab6 CG	384
	385	MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
	386	MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
	387	MODULE_LICENSE("GPL");