[deliverable/linux.git] / sound / soc / codecs / wm8728.c

/*
 * wm8728.c  --  WM8728 ALSA SoC Audio driver
 *
 * Copyright 2008 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <broonie@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/spi/spi.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "wm8728.h"

/*
 * We can't read the WM8728 register space so we cache them instead.
 * Note that the defaults here aren't the physical defaults, we latch
 * the volume update bits, mute the output and enable infinite zero
 * detect.
 */
static const u16 wm8728_reg_defaults[] = {
	0x1ff,
	0x1ff,
	0x001,
	0x100,
};

/* codec private data */
struct wm8728_priv {
	enum snd_soc_control_type control_type;
};

static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);

static const struct snd_kcontrol_new wm8728_snd_controls[] = {

SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
		 0, 255, 0, wm8728_tlv),

SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
};

/*
 * DAPM controls.
 */
static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("VOUTL"),
SND_SOC_DAPM_OUTPUT("VOUTR"),
};

static const struct snd_soc_dapm_route wm8728_intercon[] = {
	{"VOUTL", NULL, "DAC"},
	{"VOUTR", NULL, "DAC"},
};

static int wm8728_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);

	if (mute)
		snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1);
	else
		snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);

	return 0;
}

static int wm8728_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;
	u16 dac = snd_soc_read(codec, WM8728_DACCTL);

	dac &= ~0x18;

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		dac |= 0x10;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		dac |= 0x08;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_write(codec, WM8728_DACCTL, dac);

	return 0;
}

static int wm8728_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, WM8728_IFCTL);

	/* Currently only I2S is supported by the driver, though the
	 * hardware is more flexible.
	 */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		iface |= 1;
		break;
	default:
		return -EINVAL;
	}

	/* The hardware only support full slave mode */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		iface &= ~0x22;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		iface |=  0x20;
		iface &= ~0x02;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		iface |= 0x02;
		iface &= ~0x20;
		break;
	case SND_SOC_DAIFMT_IB_IF:
		iface |= 0x22;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_write(codec, WM8728_IFCTL, iface);
	return 0;
}

static int wm8728_set_bias_level(struct snd_soc_codec *codec,
				 enum snd_soc_bias_level level)
{
	u16 reg;
	int i;

	switch (level) {
	case SND_SOC_BIAS_ON:
	case SND_SOC_BIAS_PREPARE:
	case SND_SOC_BIAS_STANDBY:
		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
			/* Power everything up... */
			reg = snd_soc_read(codec, WM8728_DACCTL);
			snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);

			/* ..then sync in the register cache. */
			for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
				snd_soc_write(codec, i,
					     snd_soc_read(codec, i));
		}
		break;

	case SND_SOC_BIAS_OFF:
		reg = snd_soc_read(codec, WM8728_DACCTL);
		snd_soc_write(codec, WM8728_DACCTL, reg | 0x4);
		break;
	}
	codec->dapm.bias_level = level;
	return 0;
}

#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)

#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
	SNDRV_PCM_FMTBIT_S24_LE)

static struct snd_soc_dai_ops wm8728_dai_ops = {
	.hw_params	= wm8728_hw_params,
	.digital_mute	= wm8728_mute,
	.set_fmt	= wm8728_set_dai_fmt,
};

static struct snd_soc_dai_driver wm8728_dai = {
	.name = "wm8728-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = WM8728_RATES,
		.formats = WM8728_FORMATS,
	},
	.ops = &wm8728_dai_ops,
};

static int wm8728_suspend(struct snd_soc_codec *codec, pm_message_t state)
{
	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);

	return 0;
}

static int wm8728_resume(struct snd_soc_codec *codec)
{
	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	return 0;
}

static int wm8728_probe(struct snd_soc_codec *codec)
{
	struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec);
	int ret;

	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8728->control_type);
	if (ret < 0) {
		printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
		       ret);
		return ret;
	}

	/* power on device */
	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	snd_soc_add_controls(codec, wm8728_snd_controls,
				ARRAY_SIZE(wm8728_snd_controls));

	return ret;
}

static int wm8728_remove(struct snd_soc_codec *codec)
{
	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_wm8728 = {
	.probe =	wm8728_probe,
	.remove =	wm8728_remove,
	.suspend =	wm8728_suspend,
	.resume =	wm8728_resume,
	.set_bias_level = wm8728_set_bias_level,
	.reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults),
	.reg_word_size = sizeof(u16),
	.reg_cache_default = wm8728_reg_defaults,
	.dapm_widgets = wm8728_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets),
	.dapm_routes = wm8728_intercon,
	.num_dapm_routes = ARRAY_SIZE(wm8728_intercon),
};

static const struct of_device_id wm8728_of_match[] = {
	{ .compatible = "wlf,wm8728", },
	{ }
};
MODULE_DEVICE_TABLE(of, wm8728_of_match);

#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8728_spi_probe(struct spi_device *spi)
{
	struct wm8728_priv *wm8728;
	int ret;

	wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
	if (wm8728 == NULL)
		return -ENOMEM;

	wm8728->control_type = SND_SOC_SPI;
	spi_set_drvdata(spi, wm8728);

	ret = snd_soc_register_codec(&spi->dev,
			&soc_codec_dev_wm8728, &wm8728_dai, 1);
	if (ret < 0)
		kfree(wm8728);
	return ret;
}

static int __devexit wm8728_spi_remove(struct spi_device *spi)
{
	snd_soc_unregister_codec(&spi->dev);
	kfree(spi_get_drvdata(spi));
	return 0;
}

static struct spi_driver wm8728_spi_driver = {
	.driver = {
		.name	= "wm8728",
		.owner	= THIS_MODULE,
		.of_match_table = wm8728_of_match,
	},
	.probe		= wm8728_spi_probe,
	.remove		= __devexit_p(wm8728_spi_remove),
};
#endif /* CONFIG_SPI_MASTER */

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static __devinit int wm8728_i2c_probe(struct i2c_client *i2c,
				      const struct i2c_device_id *id)
{
	struct wm8728_priv *wm8728;
	int ret;

	wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
	if (wm8728 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, wm8728);
	wm8728->control_type = SND_SOC_I2C;

	ret =  snd_soc_register_codec(&i2c->dev,
			&soc_codec_dev_wm8728, &wm8728_dai, 1);
	if (ret < 0)
		kfree(wm8728);
	return ret;
}

static __devexit int wm8728_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	kfree(i2c_get_clientdata(client));
	return 0;
}

static const struct i2c_device_id wm8728_i2c_id[] = {
	{ "wm8728", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);

static struct i2c_driver wm8728_i2c_driver = {
	.driver = {
		.name = "wm8728",
		.owner = THIS_MODULE,
		.of_match_table = wm8728_of_match,
	},
	.probe =    wm8728_i2c_probe,
	.remove =   __devexit_p(wm8728_i2c_remove),
	.id_table = wm8728_i2c_id,
};
#endif

static int __init wm8728_modinit(void)
{
	int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	ret = i2c_add_driver(&wm8728_i2c_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
		       ret);
	}
#endif
#if defined(CONFIG_SPI_MASTER)
	ret = spi_register_driver(&wm8728_spi_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
		       ret);
	}
#endif
	return ret;
}
module_init(wm8728_modinit);

static void __exit wm8728_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&wm8728_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&wm8728_spi_driver);
#endif
}
module_exit(wm8728_exit);

MODULE_DESCRIPTION("ASoC WM8728 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
71cfc902 MB	1	/*
	2	* wm8728.c -- WM8728 ALSA SoC Audio driver
	3	*
	4	* Copyright 2008 Wolfson Microelectronics plc
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/moduleparam.h>
	15	#include <linux/init.h>
	16	#include <linux/delay.h>
	17	#include <linux/pm.h>
	18	#include <linux/i2c.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/spi/spi.h>
5a0e3ad6	21	#include <linux/slab.h>
45b4d043	22	#include <linux/of_device.h>
71cfc902 MB	23	#include <sound/core.h>
	24	#include <sound/pcm.h>
	25	#include <sound/pcm_params.h>
	26	#include <sound/soc.h>
71cfc902 MB	27	#include <sound/initval.h>
	28	#include <sound/tlv.h>
	29
	30	#include "wm8728.h"
	31
71cfc902 MB	32	/*
	33	* We can't read the WM8728 register space so we cache them instead.
	34	* Note that the defaults here aren't the physical defaults, we latch
	35	* the volume update bits, mute the output and enable infinite zero
	36	* detect.
	37	*/
	38	static const u16 wm8728_reg_defaults[] = {
	39	0x1ff,
	40	0x1ff,
	41	0x001,
	42	0x100,
	43	};
	44
f0fba2ad LG	45	/* codec private data */
	46	struct wm8728_priv {
	47	enum snd_soc_control_type control_type;
f0fba2ad LG	48	};
f0fba2ad LG	49
71cfc902 MB	50	static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
	51
	52	static const struct snd_kcontrol_new wm8728_snd_controls[] = {
	53
	54	SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
	55	0, 255, 0, wm8728_tlv),
	56
	57	SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
	58	};
	59
71cfc902 MB	60	/*
	61	* DAPM controls.
	62	*/
	63	static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
	64	SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
	65	SND_SOC_DAPM_OUTPUT("VOUTL"),
	66	SND_SOC_DAPM_OUTPUT("VOUTR"),
	67	};
	68
8428edf9	69	static const struct snd_soc_dapm_route wm8728_intercon[] = {
71cfc902 MB	70	{"VOUTL", NULL, "DAC"},
	71	{"VOUTR", NULL, "DAC"},
	72	};
	73
71cfc902 MB	74	static int wm8728_mute(struct snd_soc_dai *dai, int mute)
	75	{
	76	struct snd_soc_codec *codec = dai->codec;
17a52fd6	77	u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
71cfc902 MB	78
71cfc902 MB	79	if (mute)
17a52fd6	80	snd_soc_write(codec, WM8728_DACCTL, mute_reg \| 1);
71cfc902	81	else
17a52fd6	82	snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);
71cfc902 MB	83
	84	return 0;
	85	}
	86
	87	static int wm8728_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	88	struct snd_pcm_hw_params *params,
dee89c4d MB	89	struct snd_soc_dai *dai)
71cfc902 MB	90	{
71cfc902 MB	91	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	92	struct snd_soc_codec *codec = rtd->codec;
17a52fd6	93	u16 dac = snd_soc_read(codec, WM8728_DACCTL);
71cfc902 MB	94
	95	dac &= ~0x18;
	96
	97	switch (params_format(params)) {
	98	case SNDRV_PCM_FORMAT_S16_LE:
	99	break;
	100	case SNDRV_PCM_FORMAT_S20_3LE:
	101	dac \|= 0x10;
	102	break;
	103	case SNDRV_PCM_FORMAT_S24_LE:
	104	dac \|= 0x08;
	105	break;
	106	default:
	107	return -EINVAL;
	108	}
	109
17a52fd6	110	snd_soc_write(codec, WM8728_DACCTL, dac);
71cfc902 MB	111
	112	return 0;
	113	}
	114
	115	static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
	116	unsigned int fmt)
	117	{
	118	struct snd_soc_codec *codec = codec_dai->codec;
17a52fd6	119	u16 iface = snd_soc_read(codec, WM8728_IFCTL);
71cfc902 MB	120
	121	/* Currently only I2S is supported by the driver, though the
	122	* hardware is more flexible.
	123	*/
	124	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	125	case SND_SOC_DAIFMT_I2S:
	126	iface \|= 1;
	127	break;
	128	default:
	129	return -EINVAL;
	130	}
	131
	132	/* The hardware only support full slave mode */
	133	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	134	case SND_SOC_DAIFMT_CBS_CFS:
	135	break;
	136	default:
	137	return -EINVAL;
	138	}
	139
	140	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	141	case SND_SOC_DAIFMT_NB_NF:
	142	iface &= ~0x22;
	143	break;
	144	case SND_SOC_DAIFMT_IB_NF:
	145	iface \|= 0x20;
	146	iface &= ~0x02;
	147	break;
	148	case SND_SOC_DAIFMT_NB_IF:
	149	iface \|= 0x02;
	150	iface &= ~0x20;
	151	break;
	152	case SND_SOC_DAIFMT_IB_IF:
	153	iface \|= 0x22;
	154	break;
	155	default:
	156	return -EINVAL;
	157	}
	158
17a52fd6	159	snd_soc_write(codec, WM8728_IFCTL, iface);
71cfc902 MB	160	return 0;
	161	}
	162
	163	static int wm8728_set_bias_level(struct snd_soc_codec *codec,
	164	enum snd_soc_bias_level level)
	165	{
	166	u16 reg;
	167	int i;
	168
	169	switch (level) {
	170	case SND_SOC_BIAS_ON:
	171	case SND_SOC_BIAS_PREPARE:
	172	case SND_SOC_BIAS_STANDBY:
ce6120cc	173	if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
71cfc902	174	/* Power everything up... */
17a52fd6 MB	175	reg = snd_soc_read(codec, WM8728_DACCTL);
17a52fd6 MB	176	snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
71cfc902 MB	177
	178	/* ..then sync in the register cache. */
	179	for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
17a52fd6 MB	180	snd_soc_write(codec, i,
17a52fd6 MB	181	snd_soc_read(codec, i));
71cfc902 MB	182	}
	183	break;
	184
	185	case SND_SOC_BIAS_OFF:
17a52fd6 MB	186	reg = snd_soc_read(codec, WM8728_DACCTL);
17a52fd6 MB	187	snd_soc_write(codec, WM8728_DACCTL, reg \| 0x4);
71cfc902 MB	188	break;
71cfc902 MB	189	}
ce6120cc	190	codec->dapm.bias_level = level;
71cfc902 MB	191	return 0;
	192	}
	193
	194	#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
	195
	196	#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	197	SNDRV_PCM_FMTBIT_S24_LE)
	198
6335d055 EM	199	static struct snd_soc_dai_ops wm8728_dai_ops = {
	200	.hw_params = wm8728_hw_params,
	201	.digital_mute = wm8728_mute,
	202	.set_fmt = wm8728_set_dai_fmt,
	203	};
	204
f0fba2ad LG	205	static struct snd_soc_dai_driver wm8728_dai = {
f0fba2ad LG	206	.name = "wm8728-hifi",
71cfc902 MB	207	.playback = {
	208	.stream_name = "Playback",
	209	.channels_min = 2,
	210	.channels_max = 2,
	211	.rates = WM8728_RATES,
	212	.formats = WM8728_FORMATS,
	213	},
6335d055	214	.ops = &wm8728_dai_ops,
71cfc902	215	};
71cfc902	216
f0fba2ad	217	static int wm8728_suspend(struct snd_soc_codec *codec, pm_message_t state)
71cfc902	218	{
71cfc902 MB	219	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
	220
	221	return 0;
	222	}
	223
f0fba2ad	224	static int wm8728_resume(struct snd_soc_codec *codec)
71cfc902	225	{
29e189c2	226	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
71cfc902 MB	227
	228	return 0;
	229	}
	230
f0fba2ad	231	static int wm8728_probe(struct snd_soc_codec *codec)
71cfc902	232	{
f0fba2ad LG	233	struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec);
f0fba2ad LG	234	int ret;
71cfc902	235
f0fba2ad	236	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8728->control_type);
17a52fd6 MB	237	if (ret < 0) {
	238	printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
	239	ret);
f0fba2ad	240	return ret;
71cfc902 MB	241	}
	242
	243	/* power on device */
	244	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	245
3e8e1952 IM	246	snd_soc_add_controls(codec, wm8728_snd_controls,
3e8e1952 IM	247	ARRAY_SIZE(wm8728_snd_controls));
71cfc902 MB	248
71cfc902 MB	249	return ret;
71cfc902 MB	250	}
71cfc902 MB	251
f0fba2ad	252	static int wm8728_remove(struct snd_soc_codec *codec)
71cfc902	253	{
f0fba2ad	254	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
71cfc902 MB	255	return 0;
	256	}
	257
f0fba2ad LG	258	static struct snd_soc_codec_driver soc_codec_dev_wm8728 = {
	259	.probe = wm8728_probe,
	260	.remove = wm8728_remove,
	261	.suspend = wm8728_suspend,
	262	.resume = wm8728_resume,
	263	.set_bias_level = wm8728_set_bias_level,
e5eec34c	264	.reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults),
f0fba2ad LG	265	.reg_word_size = sizeof(u16),
f0fba2ad LG	266	.reg_cache_default = wm8728_reg_defaults,
8428edf9 LG	267	.dapm_widgets = wm8728_dapm_widgets,
	268	.num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets),
	269	.dapm_routes = wm8728_intercon,
	270	.num_dapm_routes = ARRAY_SIZE(wm8728_intercon),
71cfc902 MB	271	};
71cfc902 MB	272
45b4d043 MB	273	static const struct of_device_id wm8728_of_match[] = {
	274	{ .compatible = "wlf,wm8728", },
	275	{ }
	276	};
	277	MODULE_DEVICE_TABLE(of, wm8728_of_match);
	278
71cfc902 MB	279	#if defined(CONFIG_SPI_MASTER)
	280	static int __devinit wm8728_spi_probe(struct spi_device *spi)
	281	{
f0fba2ad	282	struct wm8728_priv *wm8728;
71cfc902 MB	283	int ret;
71cfc902 MB	284
f0fba2ad LG	285	wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
	286	if (wm8728 == NULL)
	287	return -ENOMEM;
71cfc902	288
f0fba2ad LG	289	wm8728->control_type = SND_SOC_SPI;
f0fba2ad LG	290	spi_set_drvdata(spi, wm8728);
71cfc902	291
f0fba2ad LG	292	ret = snd_soc_register_codec(&spi->dev,
	293	&soc_codec_dev_wm8728, &wm8728_dai, 1);
	294	if (ret < 0)
	295	kfree(wm8728);
71cfc902 MB	296	return ret;
	297	}
	298
	299	static int __devexit wm8728_spi_remove(struct spi_device *spi)
	300	{
f0fba2ad LG	301	snd_soc_unregister_codec(&spi->dev);
f0fba2ad LG	302	kfree(spi_get_drvdata(spi));
71cfc902 MB	303	return 0;
	304	}
	305
	306	static struct spi_driver wm8728_spi_driver = {
	307	.driver = {
0473e61b	308	.name = "wm8728",
71cfc902	309	.owner = THIS_MODULE,
45b4d043	310	.of_match_table = wm8728_of_match,
71cfc902 MB	311	},
	312	.probe = wm8728_spi_probe,
	313	.remove = __devexit_p(wm8728_spi_remove),
	314	};
71cfc902 MB	315	#endif /* CONFIG_SPI_MASTER */
71cfc902 MB	316
f0fba2ad LG	317	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	318	static __devinit int wm8728_i2c_probe(struct i2c_client *i2c,
	319	const struct i2c_device_id *id)
71cfc902	320	{
f0fba2ad LG	321	struct wm8728_priv *wm8728;
f0fba2ad LG	322	int ret;
71cfc902	323
f0fba2ad LG	324	wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
f0fba2ad LG	325	if (wm8728 == NULL)
71cfc902 MB	326	return -ENOMEM;
71cfc902 MB	327
f0fba2ad	328	i2c_set_clientdata(i2c, wm8728);
f0fba2ad LG	329	wm8728->control_type = SND_SOC_I2C;
	330
	331	ret = snd_soc_register_codec(&i2c->dev,
	332	&soc_codec_dev_wm8728, &wm8728_dai, 1);
	333	if (ret < 0)
	334	kfree(wm8728);
	335	return ret;
	336	}
	337
	338	static __devexit int wm8728_i2c_remove(struct i2c_client *client)
	339	{
	340	snd_soc_unregister_codec(&client->dev);
	341	kfree(i2c_get_clientdata(client));
	342	return 0;
	343	}
71cfc902	344
f0fba2ad LG	345	static const struct i2c_device_id wm8728_i2c_id[] = {
	346	{ "wm8728", 0 },
	347	{ }
	348	};
	349	MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
	350
	351	static struct i2c_driver wm8728_i2c_driver = {
	352	.driver = {
0473e61b	353	.name = "wm8728",
f0fba2ad	354	.owner = THIS_MODULE,
45b4d043	355	.of_match_table = wm8728_of_match,
f0fba2ad LG	356	},
	357	.probe = wm8728_i2c_probe,
	358	.remove = __devexit_p(wm8728_i2c_remove),
	359	.id_table = wm8728_i2c_id,
	360	};
	361	#endif
71cfc902	362
f0fba2ad LG	363	static int __init wm8728_modinit(void)
	364	{
	365	int ret = 0;
71cfc902	366	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
f0fba2ad LG	367	ret = i2c_add_driver(&wm8728_i2c_driver);
	368	if (ret != 0) {
	369	printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
	370	ret);
71cfc902 MB	371	}
	372	#endif
	373	#if defined(CONFIG_SPI_MASTER)
f0fba2ad LG	374	ret = spi_register_driver(&wm8728_spi_driver);
	375	if (ret != 0) {
	376	printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
	377	ret);
71cfc902 MB	378	}
71cfc902 MB	379	#endif
71cfc902 MB	380	return ret;
71cfc902 MB	381	}
f0fba2ad	382	module_init(wm8728_modinit);
71cfc902	383
f0fba2ad	384	static void __exit wm8728_exit(void)
71cfc902	385	{
71cfc902	386	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
71cfc902 MB	387	i2c_del_driver(&wm8728_i2c_driver);
	388	#endif
	389	#if defined(CONFIG_SPI_MASTER)
	390	spi_unregister_driver(&wm8728_spi_driver);
	391	#endif
64089b84 MB	392	}
	393	module_exit(wm8728_exit);
	394
71cfc902 MB	395	MODULE_DESCRIPTION("ASoC WM8728 driver");
	396	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	397	MODULE_LICENSE("GPL");