[deliverable/linux.git] / sound / soc / codecs / wm8741.c

/*
 * wm8741.c  --  WM8741 ALSA SoC Audio driver
 *
 * Copyright 2010 Wolfson Microelectronics plc
 *
 * Author: Ian Lartey <ian@opensource.wolfsonmicro.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.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "wm8741.h"

#define WM8741_NUM_SUPPLIES 2
static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
	"AVDD",
	"DVDD",
};

#define WM8741_NUM_RATES 4

/* codec private data */
struct wm8741_priv {
	enum snd_soc_control_type control_type;
	void *control_data;
	u16 reg_cache[WM8741_REGISTER_COUNT];
	struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
	unsigned int sysclk;
	unsigned int rate_constraint_list[WM8741_NUM_RATES];
	struct snd_pcm_hw_constraint_list rate_constraint;
};

static const u16 wm8741_reg_defaults[WM8741_REGISTER_COUNT] = {
	0x0000,     /* R0  - DACLLSB Attenuation */
	0x0000,     /* R1  - DACLMSB Attenuation */
	0x0000,     /* R2  - DACRLSB Attenuation */
	0x0000,     /* R3  - DACRMSB Attenuation */
	0x0000,     /* R4  - Volume Control */
	0x000A,     /* R5  - Format Control */
	0x0000,     /* R6  - Filter Control */
	0x0000,     /* R7  - Mode Control 1 */
	0x0002,     /* R8  - Mode Control 2 */
	0x0000,	    /* R9  - Reset */
	0x0002,     /* R32 - ADDITONAL_CONTROL_1 */
};


static int wm8741_reset(struct snd_soc_codec *codec)
{
	return snd_soc_write(codec, WM8741_RESET, 0);
}

static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);

static const struct snd_kcontrol_new wm8741_snd_controls[] = {
SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
		 WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
		 WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
};

static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("VOUTLP"),
SND_SOC_DAPM_OUTPUT("VOUTLN"),
SND_SOC_DAPM_OUTPUT("VOUTRP"),
SND_SOC_DAPM_OUTPUT("VOUTRN"),
};

static const struct snd_soc_dapm_route intercon[] = {
	{ "VOUTLP", NULL, "DACL" },
	{ "VOUTLN", NULL, "DACL" },
	{ "VOUTRP", NULL, "DACR" },
	{ "VOUTRN", NULL, "DACR" },
};

static int wm8741_add_widgets(struct snd_soc_codec *codec)
{
	snd_soc_dapm_new_controls(codec, wm8741_dapm_widgets,
				  ARRAY_SIZE(wm8741_dapm_widgets));

	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));

	return 0;
}

static struct {
	int value;
	int ratio;
} lrclk_ratios[WM8741_NUM_RATES] = {
	{ 1, 256 },
	{ 2, 384 },
	{ 3, 512 },
	{ 4, 768 },
};


static int wm8741_startup(struct snd_pcm_substream *substream,
			  struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);

	/* The set of sample rates that can be supported depends on the
	 * MCLK supplied to the CODEC - enforce this.
	 */
	if (!wm8741->sysclk) {
		dev_err(codec->dev,
			"No MCLK configured, call set_sysclk() on init\n");
		return -EINVAL;
	}

	snd_pcm_hw_constraint_list(substream->runtime, 0,
				   SNDRV_PCM_HW_PARAM_RATE,
				   &wm8741->rate_constraint);

	return 0;
}

static int wm8741_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->codec;
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
	int i;

	/* Find a supported LRCLK ratio */
	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
		if (wm8741->sysclk / params_rate(params) ==
		    lrclk_ratios[i].ratio)
			break;
	}

	/* Should never happen, should be handled by constraints */
	if (i == ARRAY_SIZE(lrclk_ratios)) {
		dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
			wm8741->sysclk / params_rate(params));
		return -EINVAL;
	}

	/* bit size */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		iface |= 0x0001;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		iface |= 0x0002;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		iface |= 0x0003;
		break;
	default:
		dev_dbg(codec->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
			params_format(params));
		return -EINVAL;
	}

	dev_dbg(codec->dev, "wm8741_hw_params:    bit size param = %d",
		params_format(params));

	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	return 0;
}

static int wm8741_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 wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	unsigned int val;
	int i;

	dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);

	wm8741->sysclk = freq;

	wm8741->rate_constraint.count = 0;

	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
		dev_dbg(codec->dev, "index = %d, ratio = %d, freq = %d",
				i, lrclk_ratios[i].ratio, freq);

		val = freq / lrclk_ratios[i].ratio;
		/* Check that it's a standard rate since core can't
		 * cope with others and having the odd rates confuses
		 * constraint matching.
		 */
		switch (val) {
		case 32000:
		case 44100:
		case 48000:
		case 64000:
		case 88200:
		case 96000:
			dev_dbg(codec->dev, "Supported sample rate: %dHz\n",
				val);
			wm8741->rate_constraint_list[i] = val;
			wm8741->rate_constraint.count++;
			break;
		default:
			dev_dbg(codec->dev, "Skipping sample rate: %dHz\n",
				val);
		}
	}

	/* Need at least one supported rate... */
	if (wm8741->rate_constraint.count == 0)
		return -EINVAL;

	return 0;
}

static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;

	/* check master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	/* interface format */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		iface |= 0x0008;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		iface |= 0x0004;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		iface |= 0x0003;
		break;
	case SND_SOC_DAIFMT_DSP_B:
		iface |= 0x0013;
		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:
		iface |= 0x0010;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		iface |= 0x0020;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		iface |= 0x0030;
		break;
	default:
		return -EINVAL;
	}


	dev_dbg(codec->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
				fmt & SND_SOC_DAIFMT_FORMAT_MASK,
				((fmt & SND_SOC_DAIFMT_INV_MASK)));

	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	return 0;
}

#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
			SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
			SNDRV_PCM_RATE_192000)

#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_soc_dai_ops wm8741_dai_ops = {
	.startup	= wm8741_startup,
	.hw_params	= wm8741_hw_params,
	.set_sysclk	= wm8741_set_dai_sysclk,
	.set_fmt	= wm8741_set_dai_fmt,
};

static struct snd_soc_dai_driver wm8741_dai = {
	.name = "WM8741",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,  /* Mono modes not yet supported */
		.channels_max = 2,
		.rates = WM8741_RATES,
		.formats = WM8741_FORMATS,
	},
	.ops = &wm8741_dai_ops,
};

#ifdef CONFIG_PM
static int wm8741_resume(struct snd_soc_codec *codec)
{
	u16 *cache = codec->reg_cache;
	int i;

	/* RESTORE REG Cache */
	for (i = 0; i < WM8741_REGISTER_COUNT; i++) {
		if (cache[i] == wm8741_reg_defaults[i] || WM8741_RESET == i)
			continue;
		snd_soc_write(codec, i, cache[i]);
	}
	return 0;
}
#else
#define wm8741_suspend NULL
#define wm8741_resume NULL
#endif

static int wm8741_probe(struct snd_soc_codec *codec)
{
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	codec->control_data = wm8741->control_data;
	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8741->control_type);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		return ret;
	}

	ret = wm8741_reset(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to issue reset\n");
		return ret;
	}

	/* Change some default settings - latch VU */
	wm8741->reg_cache[WM8741_DACLLSB_ATTENUATION] |= WM8741_UPDATELL;
	wm8741->reg_cache[WM8741_DACLMSB_ATTENUATION] |= WM8741_UPDATELM;
	wm8741->reg_cache[WM8741_DACRLSB_ATTENUATION] |= WM8741_UPDATERL;
	wm8741->reg_cache[WM8741_DACRLSB_ATTENUATION] |= WM8741_UPDATERM;

	snd_soc_add_controls(codec, wm8741_snd_controls,
			     ARRAY_SIZE(wm8741_snd_controls));
	wm8741_add_widgets(codec);

	dev_dbg(codec->dev, "Successful registration\n");
	return ret;
}

static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
	.probe =	wm8741_probe,
	.resume =	wm8741_resume,
	.reg_cache_size = sizeof(wm8741_reg_defaults),
	.reg_word_size = sizeof(u16),
	.reg_cache_default = &wm8741_reg_defaults,
};

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static int wm8741_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct wm8741_priv *wm8741;
	int ret, i;

	wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL);
	if (wm8741 == NULL)
		return -ENOMEM;

	wm8741->rate_constraint.list = &wm8741->rate_constraint_list[0];
	wm8741->rate_constraint.count =
		ARRAY_SIZE(wm8741->rate_constraint_list);

	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
		wm8741->supplies[i].supply = wm8741_supply_names[i];

	ret = regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
				 wm8741->supplies);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
		goto err;
	}

	ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
				    wm8741->supplies);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
		goto err_get;
	}

	i2c_set_clientdata(i2c, wm8741);
	wm8741->control_data = i2c;
	wm8741->control_type = SND_SOC_I2C;

	ret =  snd_soc_register_codec(&i2c->dev,
			&soc_codec_dev_wm8741, &wm8741_dai, 1);
	if (ret < 0)
		goto err_enable;
	return ret;

err_enable:
	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);

err_get:
	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
err:
	kfree(wm8741);
	return ret;
}

static int wm8741_i2c_remove(struct i2c_client *client)
{
	struct wm8741_priv *wm8741 = i2c_get_clientdata(client);

	snd_soc_unregister_codec(&client->dev);
	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	kfree(i2c_get_clientdata(client));
	return 0;
}

static const struct i2c_device_id wm8741_i2c_id[] = {
	{ "wm8741", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);

static struct i2c_driver wm8741_i2c_driver = {
	.driver = {
		.name = "wm8741-codec",
		.owner = THIS_MODULE,
	},
	.probe =    wm8741_i2c_probe,
	.remove =   wm8741_i2c_remove,
	.id_table = wm8741_i2c_id,
};
#endif

static int __init wm8741_modinit(void)
{
	int ret = 0;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	ret = i2c_add_driver(&wm8741_i2c_driver);
	if (ret != 0) {
		pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
	}
#endif

	return ret;
}
module_init(wm8741_modinit);

static void __exit wm8741_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&wm8741_i2c_driver);
#endif
}
module_exit(wm8741_exit);

MODULE_DESCRIPTION("ASoC WM8741 driver");
MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
992bee40 IL	1	/*
	2	* wm8741.c -- WM8741 ALSA SoC Audio driver
	3	*
	4	* Copyright 2010 Wolfson Microelectronics plc
	5	*
	6	* Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
	7	*
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/moduleparam.h>
	16	#include <linux/init.h>
	17	#include <linux/delay.h>
	18	#include <linux/pm.h>
	19	#include <linux/i2c.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/regulator/consumer.h>
	22	#include <linux/slab.h>
	23	#include <sound/core.h>
	24	#include <sound/pcm.h>
	25	#include <sound/pcm_params.h>
	26	#include <sound/soc.h>
	27	#include <sound/soc-dapm.h>
	28	#include <sound/initval.h>
	29	#include <sound/tlv.h>
	30
	31	#include "wm8741.h"
	32
992bee40 IL	33	#define WM8741_NUM_SUPPLIES 2
	34	static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
	35	"AVDD",
	36	"DVDD",
	37	};
	38
	39	#define WM8741_NUM_RATES 4
	40
	41	/* codec private data */
	42	struct wm8741_priv {
f0fba2ad LG	43	enum snd_soc_control_type control_type;
f0fba2ad LG	44	void *control_data;
992bee40 IL	45	u16 reg_cache[WM8741_REGISTER_COUNT];
	46	struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
	47	unsigned int sysclk;
	48	unsigned int rate_constraint_list[WM8741_NUM_RATES];
	49	struct snd_pcm_hw_constraint_list rate_constraint;
	50	};
	51
	52	static const u16 wm8741_reg_defaults[WM8741_REGISTER_COUNT] = {
	53	0x0000, /* R0 - DACLLSB Attenuation */
	54	0x0000, /* R1 - DACLMSB Attenuation */
	55	0x0000, /* R2 - DACRLSB Attenuation */
	56	0x0000, /* R3 - DACRMSB Attenuation */
	57	0x0000, /* R4 - Volume Control */
	58	0x000A, /* R5 - Format Control */
	59	0x0000, /* R6 - Filter Control */
	60	0x0000, /* R7 - Mode Control 1 */
	61	0x0002, /* R8 - Mode Control 2 */
	62	0x0000, /* R9 - Reset */
	63	0x0002, /* R32 - ADDITONAL_CONTROL_1 */
	64	};
	65
	66
	67	static int wm8741_reset(struct snd_soc_codec *codec)
	68	{
	69	return snd_soc_write(codec, WM8741_RESET, 0);
	70	}
	71
	72	static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
	73	static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
	74
	75	static const struct snd_kcontrol_new wm8741_snd_controls[] = {
	76	SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
	77	WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
	78	SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
	79	WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
	80	};
	81
	82	static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
	83	SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
	84	SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
	85	SND_SOC_DAPM_OUTPUT("VOUTLP"),
	86	SND_SOC_DAPM_OUTPUT("VOUTLN"),
	87	SND_SOC_DAPM_OUTPUT("VOUTRP"),
	88	SND_SOC_DAPM_OUTPUT("VOUTRN"),
	89	};
	90
	91	static const struct snd_soc_dapm_route intercon[] = {
	92	{ "VOUTLP", NULL, "DACL" },
	93	{ "VOUTLN", NULL, "DACL" },
	94	{ "VOUTRP", NULL, "DACR" },
	95	{ "VOUTRN", NULL, "DACR" },
	96	};
	97
	98	static int wm8741_add_widgets(struct snd_soc_codec *codec)
	99	{
	100	snd_soc_dapm_new_controls(codec, wm8741_dapm_widgets,
	101	ARRAY_SIZE(wm8741_dapm_widgets));
	102
	103	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
	104
	105	return 0;
	106	}
	107
	108	static struct {
109	int value;
110	int ratio;
111	} lrclk_ratios[WM8741_NUM_RATES] = {
112	{ 1, 256 },
113	{ 2, 384 },
114	{ 3, 512 },
115	{ 4, 768 },
116	};
117
118
119	static int wm8741_startup(struct snd_pcm_substream *substream,
120	struct snd_soc_dai *dai)
121	{
122	struct snd_soc_codec *codec = dai->codec;
123	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
124
125	/* The set of sample rates that can be supported depends on the
126	* MCLK supplied to the CODEC - enforce this.
127	*/
128	if (!wm8741->sysclk) {
129	dev_err(codec->dev,
130	"No MCLK configured, call set_sysclk() on init\n");
131	return -EINVAL;
132	}
133
134	snd_pcm_hw_constraint_list(substream->runtime, 0,
135	SNDRV_PCM_HW_PARAM_RATE,
136	&wm8741->rate_constraint);
137
138	return 0;
139	}
140
141	static int wm8741_hw_params(struct snd_pcm_substream *substream,
142	struct snd_pcm_hw_params *params,
143	struct snd_soc_dai *dai)
144	{
145	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	146	struct snd_soc_codec *codec = rtd->codec;
992bee40 IL	147	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	148	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
	149	int i;
	150
	151	/* Find a supported LRCLK ratio */
	152	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
	153	if (wm8741->sysclk / params_rate(params) ==
	154	lrclk_ratios[i].ratio)
	155	break;
	156	}
	157
	158	/* Should never happen, should be handled by constraints */
	159	if (i == ARRAY_SIZE(lrclk_ratios)) {
	160	dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
	161	wm8741->sysclk / params_rate(params));
	162	return -EINVAL;
	163	}
	164
	165	/* bit size */
	166	switch (params_format(params)) {
	167	case SNDRV_PCM_FORMAT_S16_LE:
	168	break;
	169	case SNDRV_PCM_FORMAT_S20_3LE:
	170	iface \|= 0x0001;
	171	break;
	172	case SNDRV_PCM_FORMAT_S24_LE:
	173	iface \|= 0x0002;
	174	break;
	175	case SNDRV_PCM_FORMAT_S32_LE:
	176	iface \|= 0x0003;
	177	break;
	178	default:
	179	dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
	180	params_format(params));
	181	return -EINVAL;
	182	}
	183
	184	dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
	185	params_format(params));
	186
	187	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	188	return 0;
	189	}
	190
	191	static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	192	int clk_id, unsigned int freq, int dir)
	193	{
	194	struct snd_soc_codec *codec = codec_dai->codec;
	195	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	196	unsigned int val;
	197	int i;
	198
	199	dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
	200
	201	wm8741->sysclk = freq;
	202
	203	wm8741->rate_constraint.count = 0;
	204
	205	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
	206	dev_dbg(codec->dev, "index = %d, ratio = %d, freq = %d",
	207	i, lrclk_ratios[i].ratio, freq);
	208
	209	val = freq / lrclk_ratios[i].ratio;
	210	/* Check that it's a standard rate since core can't
211	* cope with others and having the odd rates confuses
212	* constraint matching.
213	*/
214	switch (val) {
215	case 32000:
216	case 44100:
217	case 48000:
218	case 64000:
219	case 88200:
220	case 96000:
221	dev_dbg(codec->dev, "Supported sample rate: %dHz\n",
222	val);
223	wm8741->rate_constraint_list[i] = val;
224	wm8741->rate_constraint.count++;
225	break;
226	default:
227	dev_dbg(codec->dev, "Skipping sample rate: %dHz\n",
228	val);
229	}
230	}
231
232	/* Need at least one supported rate... */
233	if (wm8741->rate_constraint.count == 0)
234	return -EINVAL;
235
236	return 0;
237	}
238
239	static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
240	unsigned int fmt)
241	{
242	struct snd_soc_codec *codec = codec_dai->codec;
243	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
244
245	/* check master/slave audio interface */
246	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
247	case SND_SOC_DAIFMT_CBS_CFS:
248	break;
249	default:
250	return -EINVAL;
251	}
252
253	/* interface format */
254	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
255	case SND_SOC_DAIFMT_I2S:
256	iface \|= 0x0008;
257	break;
258	case SND_SOC_DAIFMT_RIGHT_J:
259	break;
260	case SND_SOC_DAIFMT_LEFT_J:
261	iface \|= 0x0004;
262	break;
263	case SND_SOC_DAIFMT_DSP_A:
264	iface \|= 0x0003;
265	break;
266	case SND_SOC_DAIFMT_DSP_B:
267	iface \|= 0x0013;
268	break;
269	default:
270	return -EINVAL;
271	}
272
273	/* clock inversion */
274	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
275	case SND_SOC_DAIFMT_NB_NF:
276	break;
277	case SND_SOC_DAIFMT_IB_IF:
278	iface \|= 0x0010;
279	break;
280	case SND_SOC_DAIFMT_IB_NF:
281	iface \|= 0x0020;
282	break;
283	case SND_SOC_DAIFMT_NB_IF:
284	iface \|= 0x0030;
285	break;
286	default:
287	return -EINVAL;
288	}
289
290
291	dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
292	fmt & SND_SOC_DAIFMT_FORMAT_MASK,
293	((fmt & SND_SOC_DAIFMT_INV_MASK)));
294
295	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
296	return 0;
297	}
298
299	#define WM8741_RATES (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
300	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| \
301	SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_176400 \| \
302	SNDRV_PCM_RATE_192000)
303
304	#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
305	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
306
307	static struct snd_soc_dai_ops wm8741_dai_ops = {
308	.startup = wm8741_startup,
309	.hw_params = wm8741_hw_params,
310	.set_sysclk = wm8741_set_dai_sysclk,
311	.set_fmt = wm8741_set_dai_fmt,
312	};
313
f0fba2ad	314	static struct snd_soc_dai_driver wm8741_dai = {
992bee40 IL	315	.name = "WM8741",
	316	.playback = {
	317	.stream_name = "Playback",
	318	.channels_min = 2, /* Mono modes not yet supported */
	319	.channels_max = 2,
	320	.rates = WM8741_RATES,
	321	.formats = WM8741_FORMATS,
	322	},
	323	.ops = &wm8741_dai_ops,
	324	};
992bee40 IL	325
992bee40 IL	326	#ifdef CONFIG_PM
f0fba2ad	327	static int wm8741_resume(struct snd_soc_codec *codec)
992bee40	328	{
992bee40 IL	329	u16 *cache = codec->reg_cache;
	330	int i;
	331
	332	/* RESTORE REG Cache */
	333	for (i = 0; i < WM8741_REGISTER_COUNT; i++) {
	334	if (cache[i] == wm8741_reg_defaults[i] \|\| WM8741_RESET == i)
	335	continue;
	336	snd_soc_write(codec, i, cache[i]);
	337	}
	338	return 0;
	339	}
	340	#else
	341	#define wm8741_suspend NULL
	342	#define wm8741_resume NULL
	343	#endif
	344
f0fba2ad	345	static int wm8741_probe(struct snd_soc_codec *codec)
992bee40	346	{
f0fba2ad	347	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40 IL	348	int ret = 0;
992bee40 IL	349
f0fba2ad LG	350	codec->control_data = wm8741->control_data;
	351	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8741->control_type);
	352	if (ret != 0) {
	353	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
	354	return ret;
992bee40 IL	355	}
992bee40 IL	356
f0fba2ad	357	ret = wm8741_reset(codec);
992bee40	358	if (ret < 0) {
f0fba2ad LG	359	dev_err(codec->dev, "Failed to issue reset\n");
f0fba2ad LG	360	return ret;
992bee40 IL	361	}
992bee40 IL	362
f0fba2ad LG	363	/* Change some default settings - latch VU */
	364	wm8741->reg_cache[WM8741_DACLLSB_ATTENUATION] \|= WM8741_UPDATELL;
	365	wm8741->reg_cache[WM8741_DACLMSB_ATTENUATION] \|= WM8741_UPDATELM;
	366	wm8741->reg_cache[WM8741_DACRLSB_ATTENUATION] \|= WM8741_UPDATERL;
	367	wm8741->reg_cache[WM8741_DACRLSB_ATTENUATION] \|= WM8741_UPDATERM;
	368
992bee40 IL	369	snd_soc_add_controls(codec, wm8741_snd_controls,
	370	ARRAY_SIZE(wm8741_snd_controls));
	371	wm8741_add_widgets(codec);
	372
f0fba2ad	373	dev_dbg(codec->dev, "Successful registration\n");
992bee40	374	return ret;
992bee40 IL	375	}
992bee40 IL	376
f0fba2ad	377	static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
992bee40	378	.probe = wm8741_probe,
992bee40	379	.resume = wm8741_resume,
f0fba2ad LG	380	.reg_cache_size = sizeof(wm8741_reg_defaults),
	381	.reg_word_size = sizeof(u16),
	382	.reg_cache_default = &wm8741_reg_defaults,
992bee40	383	};
992bee40	384
f0fba2ad LG	385	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	386	static int wm8741_i2c_probe(struct i2c_client *i2c,
	387	const struct i2c_device_id *id)
992bee40	388	{
f0fba2ad LG	389	struct wm8741_priv *wm8741;
f0fba2ad LG	390	int ret, i;
992bee40	391
f0fba2ad LG	392	wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL);
	393	if (wm8741 == NULL)
	394	return -ENOMEM;
992bee40 IL	395
	396	wm8741->rate_constraint.list = &wm8741->rate_constraint_list[0];
	397	wm8741->rate_constraint.count =
	398	ARRAY_SIZE(wm8741->rate_constraint_list);
	399
992bee40 IL	400	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
	401	wm8741->supplies[i].supply = wm8741_supply_names[i];
	402
f0fba2ad	403	ret = regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
992bee40 IL	404	wm8741->supplies);
992bee40 IL	405	if (ret != 0) {
f0fba2ad	406	dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
992bee40 IL	407	goto err;
	408	}
	409
	410	ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
	411	wm8741->supplies);
	412	if (ret != 0) {
f0fba2ad	413	dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
992bee40 IL	414	goto err_get;
	415	}
	416
f0fba2ad LG	417	i2c_set_clientdata(i2c, wm8741);
	418	wm8741->control_data = i2c;
	419	wm8741->control_type = SND_SOC_I2C;
992bee40	420
f0fba2ad LG	421	ret = snd_soc_register_codec(&i2c->dev,
	422	&soc_codec_dev_wm8741, &wm8741_dai, 1);
	423	if (ret < 0)
	424	goto err_enable;
	425	return ret;
992bee40 IL	426
	427	err_enable:
	428	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	429
	430	err_get:
	431	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
992bee40 IL	432	err:
	433	kfree(wm8741);
	434	return ret;
	435	}
	436
f0fba2ad	437	static int wm8741_i2c_remove(struct i2c_client *client)
992bee40 IL	438	{
992bee40 IL	439	struct wm8741_priv *wm8741 = i2c_get_clientdata(client);
f0fba2ad LG	440
	441	snd_soc_unregister_codec(&client->dev);
	442	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	443	kfree(i2c_get_clientdata(client));
992bee40 IL	444	return 0;
	445	}
	446
	447	static const struct i2c_device_id wm8741_i2c_id[] = {
	448	{ "wm8741", 0 },
	449	{ }
	450	};
	451	MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
	452
992bee40 IL	453	static struct i2c_driver wm8741_i2c_driver = {
992bee40 IL	454	.driver = {
f0fba2ad	455	.name = "wm8741-codec",
992bee40 IL	456	.owner = THIS_MODULE,
	457	},
	458	.probe = wm8741_i2c_probe,
f0fba2ad	459	.remove = wm8741_i2c_remove,
992bee40 IL	460	.id_table = wm8741_i2c_id,
	461	};
	462	#endif
	463
	464	static int __init wm8741_modinit(void)
	465	{
f0fba2ad LG	466	int ret = 0;
f0fba2ad LG	467
992bee40 IL	468	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	469	ret = i2c_add_driver(&wm8741_i2c_driver);
	470	if (ret != 0) {
f0fba2ad	471	pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
992bee40 IL	472	}
992bee40 IL	473	#endif
f0fba2ad LG	474
f0fba2ad LG	475	return ret;
992bee40 IL	476	}
	477	module_init(wm8741_modinit);
	478
	479	static void __exit wm8741_exit(void)
	480	{
	481	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	482	i2c_del_driver(&wm8741_i2c_driver);
	483	#endif
	484	}
	485	module_exit(wm8741_exit);
	486
	487	MODULE_DESCRIPTION("ASoC WM8741 driver");
	488	MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
	489	MODULE_LICENSE("GPL");