[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;
	void *control_data;
};

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;

	codec->control_data = wm8728->control_data;
	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_data = spi;
	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_data = i2c;
	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;
	48	void *control_data;
	49	};
	50
71cfc902 MB	51	static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
	52
	53	static const struct snd_kcontrol_new wm8728_snd_controls[] = {
	54
	55	SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
	56	0, 255, 0, wm8728_tlv),
	57
	58	SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
	59	};
	60
71cfc902 MB	61	/*
	62	* DAPM controls.
	63	*/
	64	static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
	65	SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
	66	SND_SOC_DAPM_OUTPUT("VOUTL"),
	67	SND_SOC_DAPM_OUTPUT("VOUTR"),
	68	};
	69
	70	static const struct snd_soc_dapm_route intercon[] = {
	71	{"VOUTL", NULL, "DAC"},
	72	{"VOUTR", NULL, "DAC"},
	73	};
	74
	75	static int wm8728_add_widgets(struct snd_soc_codec *codec)
	76	{
	77	snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets,
	78	ARRAY_SIZE(wm8728_dapm_widgets));
	79
	80	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
	81
71cfc902 MB	82	return 0;
	83	}
	84
	85	static int wm8728_mute(struct snd_soc_dai *dai, int mute)
	86	{
	87	struct snd_soc_codec *codec = dai->codec;
17a52fd6	88	u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
71cfc902 MB	89
71cfc902 MB	90	if (mute)
17a52fd6	91	snd_soc_write(codec, WM8728_DACCTL, mute_reg \| 1);
71cfc902	92	else
17a52fd6	93	snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);
71cfc902 MB	94
	95	return 0;
	96	}
	97
	98	static int wm8728_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	99	struct snd_pcm_hw_params *params,
dee89c4d MB	100	struct snd_soc_dai *dai)
71cfc902 MB	101	{
71cfc902 MB	102	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	103	struct snd_soc_codec *codec = rtd->codec;
17a52fd6	104	u16 dac = snd_soc_read(codec, WM8728_DACCTL);
71cfc902 MB	105
	106	dac &= ~0x18;
	107
	108	switch (params_format(params)) {
	109	case SNDRV_PCM_FORMAT_S16_LE:
	110	break;
	111	case SNDRV_PCM_FORMAT_S20_3LE:
	112	dac \|= 0x10;
	113	break;
	114	case SNDRV_PCM_FORMAT_S24_LE:
	115	dac \|= 0x08;
	116	break;
	117	default:
	118	return -EINVAL;
	119	}
	120
17a52fd6	121	snd_soc_write(codec, WM8728_DACCTL, dac);
71cfc902 MB	122
	123	return 0;
	124	}
	125
	126	static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
	127	unsigned int fmt)
	128	{
	129	struct snd_soc_codec *codec = codec_dai->codec;
17a52fd6	130	u16 iface = snd_soc_read(codec, WM8728_IFCTL);
71cfc902 MB	131
	132	/* Currently only I2S is supported by the driver, though the
	133	* hardware is more flexible.
	134	*/
	135	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	136	case SND_SOC_DAIFMT_I2S:
	137	iface \|= 1;
	138	break;
	139	default:
	140	return -EINVAL;
	141	}
	142
	143	/* The hardware only support full slave mode */
	144	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	145	case SND_SOC_DAIFMT_CBS_CFS:
	146	break;
	147	default:
	148	return -EINVAL;
	149	}
	150
	151	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	152	case SND_SOC_DAIFMT_NB_NF:
	153	iface &= ~0x22;
	154	break;
	155	case SND_SOC_DAIFMT_IB_NF:
	156	iface \|= 0x20;
	157	iface &= ~0x02;
	158	break;
	159	case SND_SOC_DAIFMT_NB_IF:
	160	iface \|= 0x02;
	161	iface &= ~0x20;
	162	break;
	163	case SND_SOC_DAIFMT_IB_IF:
	164	iface \|= 0x22;
	165	break;
	166	default:
	167	return -EINVAL;
	168	}
	169
17a52fd6	170	snd_soc_write(codec, WM8728_IFCTL, iface);
71cfc902 MB	171	return 0;
	172	}
	173
	174	static int wm8728_set_bias_level(struct snd_soc_codec *codec,
	175	enum snd_soc_bias_level level)
	176	{
	177	u16 reg;
	178	int i;
	179
	180	switch (level) {
	181	case SND_SOC_BIAS_ON:
	182	case SND_SOC_BIAS_PREPARE:
	183	case SND_SOC_BIAS_STANDBY:
	184	if (codec->bias_level == SND_SOC_BIAS_OFF) {
	185	/* Power everything up... */
17a52fd6 MB	186	reg = snd_soc_read(codec, WM8728_DACCTL);
17a52fd6 MB	187	snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
71cfc902 MB	188
	189	/* ..then sync in the register cache. */
	190	for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
17a52fd6 MB	191	snd_soc_write(codec, i,
17a52fd6 MB	192	snd_soc_read(codec, i));
71cfc902 MB	193	}
	194	break;
	195
	196	case SND_SOC_BIAS_OFF:
17a52fd6 MB	197	reg = snd_soc_read(codec, WM8728_DACCTL);
17a52fd6 MB	198	snd_soc_write(codec, WM8728_DACCTL, reg \| 0x4);
71cfc902 MB	199	break;
	200	}
	201	codec->bias_level = level;
	202	return 0;
	203	}
	204
	205	#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
	206
	207	#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	208	SNDRV_PCM_FMTBIT_S24_LE)
	209
6335d055 EM	210	static struct snd_soc_dai_ops wm8728_dai_ops = {
	211	.hw_params = wm8728_hw_params,
	212	.digital_mute = wm8728_mute,
	213	.set_fmt = wm8728_set_dai_fmt,
	214	};
	215
f0fba2ad LG	216	static struct snd_soc_dai_driver wm8728_dai = {
f0fba2ad LG	217	.name = "wm8728-hifi",
71cfc902 MB	218	.playback = {
	219	.stream_name = "Playback",
	220	.channels_min = 2,
	221	.channels_max = 2,
	222	.rates = WM8728_RATES,
	223	.formats = WM8728_FORMATS,
	224	},
6335d055	225	.ops = &wm8728_dai_ops,
71cfc902	226	};
71cfc902	227
f0fba2ad	228	static int wm8728_suspend(struct snd_soc_codec *codec, pm_message_t state)
71cfc902	229	{
71cfc902 MB	230	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
	231
	232	return 0;
	233	}
	234
f0fba2ad	235	static int wm8728_resume(struct snd_soc_codec *codec)
71cfc902	236	{
29e189c2	237	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
71cfc902 MB	238
	239	return 0;
	240	}
	241
f0fba2ad	242	static int wm8728_probe(struct snd_soc_codec *codec)
71cfc902	243	{
f0fba2ad LG	244	struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec);
f0fba2ad LG	245	int ret;
71cfc902	246
f0fba2ad LG	247	codec->control_data = wm8728->control_data;
f0fba2ad LG	248	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8728->control_type);
17a52fd6 MB	249	if (ret < 0) {
	250	printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
	251	ret);
f0fba2ad	252	return ret;
71cfc902 MB	253	}
	254
	255	/* power on device */
	256	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	257
3e8e1952 IM	258	snd_soc_add_controls(codec, wm8728_snd_controls,
3e8e1952 IM	259	ARRAY_SIZE(wm8728_snd_controls));
71cfc902	260	wm8728_add_widgets(codec);
71cfc902 MB	261
71cfc902 MB	262	return ret;
71cfc902 MB	263	}
71cfc902 MB	264
f0fba2ad	265	static int wm8728_remove(struct snd_soc_codec *codec)
71cfc902	266	{
f0fba2ad	267	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
71cfc902 MB	268	return 0;
	269	}
	270
f0fba2ad LG	271	static struct snd_soc_codec_driver soc_codec_dev_wm8728 = {
	272	.probe = wm8728_probe,
	273	.remove = wm8728_remove,
	274	.suspend = wm8728_suspend,
	275	.resume = wm8728_resume,
	276	.set_bias_level = wm8728_set_bias_level,
	277	.reg_cache_size = sizeof(wm8728_reg_defaults),
	278	.reg_word_size = sizeof(u16),
	279	.reg_cache_default = wm8728_reg_defaults,
71cfc902 MB	280	};
71cfc902 MB	281
71cfc902 MB	282	#if defined(CONFIG_SPI_MASTER)
	283	static int __devinit wm8728_spi_probe(struct spi_device *spi)
	284	{
f0fba2ad	285	struct wm8728_priv *wm8728;
71cfc902 MB	286	int ret;
71cfc902 MB	287
f0fba2ad LG	288	wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
	289	if (wm8728 == NULL)
	290	return -ENOMEM;
71cfc902	291
f0fba2ad LG	292	wm8728->control_data = spi;
	293	wm8728->control_type = SND_SOC_SPI;
	294	spi_set_drvdata(spi, wm8728);
71cfc902	295
f0fba2ad LG	296	ret = snd_soc_register_codec(&spi->dev,
	297	&soc_codec_dev_wm8728, &wm8728_dai, 1);
	298	if (ret < 0)
	299	kfree(wm8728);
71cfc902 MB	300	return ret;
	301	}
	302
	303	static int __devexit wm8728_spi_remove(struct spi_device *spi)
	304	{
f0fba2ad LG	305	snd_soc_unregister_codec(&spi->dev);
f0fba2ad LG	306	kfree(spi_get_drvdata(spi));
71cfc902 MB	307	return 0;
	308	}
	309
	310	static struct spi_driver wm8728_spi_driver = {
	311	.driver = {
f0fba2ad	312	.name = "wm8728-codec",
71cfc902 MB	313	.bus = &spi_bus_type,
	314	.owner = THIS_MODULE,
	315	},
	316	.probe = wm8728_spi_probe,
	317	.remove = __devexit_p(wm8728_spi_remove),
	318	};
71cfc902 MB	319	#endif /* CONFIG_SPI_MASTER */
71cfc902 MB	320
f0fba2ad LG	321	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	322	static __devinit int wm8728_i2c_probe(struct i2c_client *i2c,
	323	const struct i2c_device_id *id)
71cfc902	324	{
f0fba2ad LG	325	struct wm8728_priv *wm8728;
f0fba2ad LG	326	int ret;
71cfc902	327
f0fba2ad LG	328	wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
f0fba2ad LG	329	if (wm8728 == NULL)
71cfc902 MB	330	return -ENOMEM;
71cfc902 MB	331
f0fba2ad LG	332	i2c_set_clientdata(i2c, wm8728);
	333	wm8728->control_data = i2c;
	334	wm8728->control_type = SND_SOC_I2C;
	335
	336	ret = snd_soc_register_codec(&i2c->dev,
	337	&soc_codec_dev_wm8728, &wm8728_dai, 1);
	338	if (ret < 0)
	339	kfree(wm8728);
	340	return ret;
	341	}
	342
	343	static __devexit int wm8728_i2c_remove(struct i2c_client *client)
	344	{
	345	snd_soc_unregister_codec(&client->dev);
	346	kfree(i2c_get_clientdata(client));
	347	return 0;
	348	}
71cfc902	349
f0fba2ad LG	350	static const struct i2c_device_id wm8728_i2c_id[] = {
	351	{ "wm8728", 0 },
	352	{ }
	353	};
	354	MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
	355
	356	static struct i2c_driver wm8728_i2c_driver = {
	357	.driver = {
	358	.name = "wm8728-codec",
	359	.owner = THIS_MODULE,
	360	},
	361	.probe = wm8728_i2c_probe,
	362	.remove = __devexit_p(wm8728_i2c_remove),
	363	.id_table = wm8728_i2c_id,
	364	};
	365	#endif
71cfc902	366
f0fba2ad LG	367	static int __init wm8728_modinit(void)
	368	{
	369	int ret = 0;
71cfc902	370	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
f0fba2ad LG	371	ret = i2c_add_driver(&wm8728_i2c_driver);
	372	if (ret != 0) {
	373	printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
	374	ret);
71cfc902 MB	375	}
	376	#endif
	377	#if defined(CONFIG_SPI_MASTER)
f0fba2ad LG	378	ret = spi_register_driver(&wm8728_spi_driver);
	379	if (ret != 0) {
	380	printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
	381	ret);
71cfc902 MB	382	}
71cfc902 MB	383	#endif
71cfc902 MB	384	return ret;
71cfc902 MB	385	}
f0fba2ad	386	module_init(wm8728_modinit);
71cfc902	387
f0fba2ad	388	static void __exit wm8728_exit(void)
71cfc902	389	{
71cfc902	390	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
71cfc902 MB	391	i2c_del_driver(&wm8728_i2c_driver);
	392	#endif
	393	#if defined(CONFIG_SPI_MASTER)
	394	spi_unregister_driver(&wm8728_spi_driver);
	395	#endif
64089b84 MB	396	}
	397	module_exit(wm8728_exit);
	398
71cfc902 MB	399	MODULE_DESCRIPTION("ASoC WM8728 driver");
	400	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	401	MODULE_LICENSE("GPL");