[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 <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 "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 intercon[] = {
	{"VOUTL", NULL, "DAC"},
	{"VOUTR", NULL, "DAC"},
};

static int wm8728_add_widgets(struct snd_soc_codec *codec)
{
	snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets,
				  ARRAY_SIZE(wm8728_dapm_widgets));

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

	return 0;
}

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->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->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));
	wm8728_add_widgets(codec);

	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 = sizeof(wm8728_reg_defaults),
	.reg_word_size = sizeof(u16),
	.reg_cache_default = wm8728_reg_defaults,
};

#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-codec",
		.bus	= &spi_bus_type,
		.owner	= THIS_MODULE,
	},
	.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-codec",
		.owner = THIS_MODULE,
	},
	.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>
71cfc902 MB	22	#include <sound/core.h>
	23	#include <sound/pcm.h>
	24	#include <sound/pcm_params.h>
	25	#include <sound/soc.h>
	26	#include <sound/soc-dapm.h>
	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
	69	static const struct snd_soc_dapm_route intercon[] = {
	70	{"VOUTL", NULL, "DAC"},
	71	{"VOUTR", NULL, "DAC"},
	72	};
	73
	74	static int wm8728_add_widgets(struct snd_soc_codec *codec)
	75	{
	76	snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets,
	77	ARRAY_SIZE(wm8728_dapm_widgets));
	78
	79	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
	80
71cfc902 MB	81	return 0;
	82	}
	83
	84	static int wm8728_mute(struct snd_soc_dai *dai, int mute)
	85	{
	86	struct snd_soc_codec *codec = dai->codec;
17a52fd6	87	u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
71cfc902 MB	88
71cfc902 MB	89	if (mute)
17a52fd6	90	snd_soc_write(codec, WM8728_DACCTL, mute_reg \| 1);
71cfc902	91	else
17a52fd6	92	snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);
71cfc902 MB	93
	94	return 0;
	95	}
	96
	97	static int wm8728_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	98	struct snd_pcm_hw_params *params,
dee89c4d MB	99	struct snd_soc_dai *dai)
71cfc902 MB	100	{
71cfc902 MB	101	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	102	struct snd_soc_codec *codec = rtd->codec;
17a52fd6	103	u16 dac = snd_soc_read(codec, WM8728_DACCTL);
71cfc902 MB	104
	105	dac &= ~0x18;
	106
	107	switch (params_format(params)) {
	108	case SNDRV_PCM_FORMAT_S16_LE:
	109	break;
	110	case SNDRV_PCM_FORMAT_S20_3LE:
	111	dac \|= 0x10;
	112	break;
	113	case SNDRV_PCM_FORMAT_S24_LE:
	114	dac \|= 0x08;
	115	break;
	116	default:
	117	return -EINVAL;
	118	}
	119
17a52fd6	120	snd_soc_write(codec, WM8728_DACCTL, dac);
71cfc902 MB	121
	122	return 0;
	123	}
	124
	125	static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
	126	unsigned int fmt)
	127	{
	128	struct snd_soc_codec *codec = codec_dai->codec;
17a52fd6	129	u16 iface = snd_soc_read(codec, WM8728_IFCTL);
71cfc902 MB	130
	131	/* Currently only I2S is supported by the driver, though the
	132	* hardware is more flexible.
	133	*/
	134	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	135	case SND_SOC_DAIFMT_I2S:
	136	iface \|= 1;
	137	break;
	138	default:
	139	return -EINVAL;
	140	}
	141
	142	/* The hardware only support full slave mode */
	143	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	144	case SND_SOC_DAIFMT_CBS_CFS:
	145	break;
	146	default:
	147	return -EINVAL;
	148	}
	149
	150	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	151	case SND_SOC_DAIFMT_NB_NF:
	152	iface &= ~0x22;
	153	break;
	154	case SND_SOC_DAIFMT_IB_NF:
	155	iface \|= 0x20;
	156	iface &= ~0x02;
	157	break;
	158	case SND_SOC_DAIFMT_NB_IF:
	159	iface \|= 0x02;
	160	iface &= ~0x20;
	161	break;
	162	case SND_SOC_DAIFMT_IB_IF:
	163	iface \|= 0x22;
	164	break;
	165	default:
	166	return -EINVAL;
	167	}
	168
17a52fd6	169	snd_soc_write(codec, WM8728_IFCTL, iface);
71cfc902 MB	170	return 0;
	171	}
	172
	173	static int wm8728_set_bias_level(struct snd_soc_codec *codec,
	174	enum snd_soc_bias_level level)
	175	{
	176	u16 reg;
	177	int i;
	178
	179	switch (level) {
	180	case SND_SOC_BIAS_ON:
	181	case SND_SOC_BIAS_PREPARE:
	182	case SND_SOC_BIAS_STANDBY:
	183	if (codec->bias_level == SND_SOC_BIAS_OFF) {
	184	/* Power everything up... */
17a52fd6 MB	185	reg = snd_soc_read(codec, WM8728_DACCTL);
17a52fd6 MB	186	snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
71cfc902 MB	187
	188	/* ..then sync in the register cache. */
	189	for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
17a52fd6 MB	190	snd_soc_write(codec, i,
17a52fd6 MB	191	snd_soc_read(codec, i));
71cfc902 MB	192	}
	193	break;
	194
	195	case SND_SOC_BIAS_OFF:
17a52fd6 MB	196	reg = snd_soc_read(codec, WM8728_DACCTL);
17a52fd6 MB	197	snd_soc_write(codec, WM8728_DACCTL, reg \| 0x4);
71cfc902 MB	198	break;
	199	}
	200	codec->bias_level = level;
	201	return 0;
	202	}
	203
	204	#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
	205
	206	#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	207	SNDRV_PCM_FMTBIT_S24_LE)
	208
6335d055 EM	209	static struct snd_soc_dai_ops wm8728_dai_ops = {
	210	.hw_params = wm8728_hw_params,
	211	.digital_mute = wm8728_mute,
	212	.set_fmt = wm8728_set_dai_fmt,
	213	};
	214
f0fba2ad LG	215	static struct snd_soc_dai_driver wm8728_dai = {
f0fba2ad LG	216	.name = "wm8728-hifi",
71cfc902 MB	217	.playback = {
	218	.stream_name = "Playback",
	219	.channels_min = 2,
	220	.channels_max = 2,
	221	.rates = WM8728_RATES,
	222	.formats = WM8728_FORMATS,
	223	},
6335d055	224	.ops = &wm8728_dai_ops,
71cfc902	225	};
71cfc902	226
f0fba2ad	227	static int wm8728_suspend(struct snd_soc_codec *codec, pm_message_t state)
71cfc902	228	{
71cfc902 MB	229	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
	230
	231	return 0;
	232	}
	233
f0fba2ad	234	static int wm8728_resume(struct snd_soc_codec *codec)
71cfc902	235	{
29e189c2	236	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
71cfc902 MB	237
	238	return 0;
	239	}
	240
f0fba2ad	241	static int wm8728_probe(struct snd_soc_codec *codec)
71cfc902	242	{
f0fba2ad LG	243	struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec);
f0fba2ad LG	244	int ret;
71cfc902	245
f0fba2ad	246	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8728->control_type);
17a52fd6 MB	247	if (ret < 0) {
	248	printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
	249	ret);
f0fba2ad	250	return ret;
71cfc902 MB	251	}
	252
	253	/* power on device */
	254	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	255
3e8e1952 IM	256	snd_soc_add_controls(codec, wm8728_snd_controls,
3e8e1952 IM	257	ARRAY_SIZE(wm8728_snd_controls));
71cfc902	258	wm8728_add_widgets(codec);
71cfc902 MB	259
71cfc902 MB	260	return ret;
71cfc902 MB	261	}
71cfc902 MB	262
f0fba2ad	263	static int wm8728_remove(struct snd_soc_codec *codec)
71cfc902	264	{
f0fba2ad	265	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
71cfc902 MB	266	return 0;
	267	}
	268
f0fba2ad LG	269	static struct snd_soc_codec_driver soc_codec_dev_wm8728 = {
	270	.probe = wm8728_probe,
	271	.remove = wm8728_remove,
	272	.suspend = wm8728_suspend,
	273	.resume = wm8728_resume,
	274	.set_bias_level = wm8728_set_bias_level,
	275	.reg_cache_size = sizeof(wm8728_reg_defaults),
	276	.reg_word_size = sizeof(u16),
	277	.reg_cache_default = wm8728_reg_defaults,
71cfc902 MB	278	};
71cfc902 MB	279
71cfc902 MB	280	#if defined(CONFIG_SPI_MASTER)
	281	static int __devinit wm8728_spi_probe(struct spi_device *spi)
	282	{
f0fba2ad	283	struct wm8728_priv *wm8728;
71cfc902 MB	284	int ret;
71cfc902 MB	285
f0fba2ad LG	286	wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
	287	if (wm8728 == NULL)
	288	return -ENOMEM;
71cfc902	289
f0fba2ad LG	290	wm8728->control_type = SND_SOC_SPI;
f0fba2ad LG	291	spi_set_drvdata(spi, wm8728);
71cfc902	292
f0fba2ad LG	293	ret = snd_soc_register_codec(&spi->dev,
	294	&soc_codec_dev_wm8728, &wm8728_dai, 1);
	295	if (ret < 0)
	296	kfree(wm8728);
71cfc902 MB	297	return ret;
	298	}
	299
	300	static int __devexit wm8728_spi_remove(struct spi_device *spi)
	301	{
f0fba2ad LG	302	snd_soc_unregister_codec(&spi->dev);
f0fba2ad LG	303	kfree(spi_get_drvdata(spi));
71cfc902 MB	304	return 0;
	305	}
	306
	307	static struct spi_driver wm8728_spi_driver = {
	308	.driver = {
f0fba2ad	309	.name = "wm8728-codec",
71cfc902 MB	310	.bus = &spi_bus_type,
	311	.owner = THIS_MODULE,
	312	},
	313	.probe = wm8728_spi_probe,
	314	.remove = __devexit_p(wm8728_spi_remove),
	315	};
71cfc902 MB	316	#endif /* CONFIG_SPI_MASTER */
71cfc902 MB	317
f0fba2ad LG	318	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	319	static __devinit int wm8728_i2c_probe(struct i2c_client *i2c,
	320	const struct i2c_device_id *id)
71cfc902	321	{
f0fba2ad LG	322	struct wm8728_priv *wm8728;
f0fba2ad LG	323	int ret;
71cfc902	324
f0fba2ad LG	325	wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
f0fba2ad LG	326	if (wm8728 == NULL)
71cfc902 MB	327	return -ENOMEM;
71cfc902 MB	328
f0fba2ad	329	i2c_set_clientdata(i2c, wm8728);
f0fba2ad LG	330	wm8728->control_type = SND_SOC_I2C;
	331
	332	ret = snd_soc_register_codec(&i2c->dev,
	333	&soc_codec_dev_wm8728, &wm8728_dai, 1);
	334	if (ret < 0)
	335	kfree(wm8728);
	336	return ret;
	337	}
	338
	339	static __devexit int wm8728_i2c_remove(struct i2c_client *client)
	340	{
	341	snd_soc_unregister_codec(&client->dev);
	342	kfree(i2c_get_clientdata(client));
	343	return 0;
	344	}
71cfc902	345
f0fba2ad LG	346	static const struct i2c_device_id wm8728_i2c_id[] = {
	347	{ "wm8728", 0 },
	348	{ }
	349	};
	350	MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
	351
	352	static struct i2c_driver wm8728_i2c_driver = {
	353	.driver = {
	354	.name = "wm8728-codec",
	355	.owner = THIS_MODULE,
	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");