[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/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),
};

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