[net-next-2.6.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"

struct snd_soc_codec_device soc_codec_dev_wm8728;

/*
 * 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,
};

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_device *socdev = rtd->socdev;
	struct snd_soc_codec *codec = socdev->card->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,
};

struct snd_soc_dai wm8728_dai = {
	.name = "WM8728",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = WM8728_RATES,
		.formats = WM8728_FORMATS,
	},
	.ops = &wm8728_dai_ops,
};
EXPORT_SYMBOL_GPL(wm8728_dai);

static int wm8728_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;

	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);

	return 0;
}

static int wm8728_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;

	wm8728_set_bias_level(codec, codec->suspend_bias_level);

	return 0;
}

/*
 * initialise the WM8728 driver
 * register the mixer and dsp interfaces with the kernel
 */
static int wm8728_init(struct snd_soc_device *socdev,
		       enum snd_soc_control_type control)
{
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret = 0;

	codec->name = "WM8728";
	codec->owner = THIS_MODULE;
	codec->set_bias_level = wm8728_set_bias_level;
	codec->dai = &wm8728_dai;
	codec->num_dai = 1;
	codec->bias_level = SND_SOC_BIAS_OFF;
	codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults);
	codec->reg_cache = kmemdup(wm8728_reg_defaults,
				   sizeof(wm8728_reg_defaults),
				   GFP_KERNEL);
	if (codec->reg_cache == NULL)
		return -ENOMEM;

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

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		printk(KERN_ERR "wm8728: failed to create pcms\n");
		goto err;
	}

	/* 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;

err:
	kfree(codec->reg_cache);
	return ret;
}

static struct snd_soc_device *wm8728_socdev;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)

/*
 * WM8728 2 wire address is determined by GPIO5
 * state during powerup.
 *    low  = 0x1a
 *    high = 0x1b
 */

static int wm8728_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct snd_soc_device *socdev = wm8728_socdev;
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret;

	i2c_set_clientdata(i2c, codec);
	codec->control_data = i2c;

	ret = wm8728_init(socdev, SND_SOC_I2C);
	if (ret < 0)
		pr_err("failed to initialise WM8728\n");

	return ret;
}

static int wm8728_i2c_remove(struct i2c_client *client)
{
	struct snd_soc_codec *codec = i2c_get_clientdata(client);
	kfree(codec->reg_cache);
	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 I2C Codec",
		.owner = THIS_MODULE,
	},
	.probe =    wm8728_i2c_probe,
	.remove =   wm8728_i2c_remove,
	.id_table = wm8728_i2c_id,
};

static int wm8728_add_i2c_device(struct platform_device *pdev,
				 const struct wm8728_setup_data *setup)
{
	struct i2c_board_info info;
	struct i2c_adapter *adapter;
	struct i2c_client *client;
	int ret;

	ret = i2c_add_driver(&wm8728_i2c_driver);
	if (ret != 0) {
		dev_err(&pdev->dev, "can't add i2c driver\n");
		return ret;
	}

	memset(&info, 0, sizeof(struct i2c_board_info));
	info.addr = setup->i2c_address;
	strlcpy(info.type, "wm8728", I2C_NAME_SIZE);

	adapter = i2c_get_adapter(setup->i2c_bus);
	if (!adapter) {
		dev_err(&pdev->dev, "can't get i2c adapter %d\n",
			setup->i2c_bus);
		goto err_driver;
	}

	client = i2c_new_device(adapter, &info);
	i2c_put_adapter(adapter);
	if (!client) {
		dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
			(unsigned int)info.addr);
		goto err_driver;
	}

	return 0;

err_driver:
	i2c_del_driver(&wm8728_i2c_driver);
	return -ENODEV;
}
#endif

#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8728_spi_probe(struct spi_device *spi)
{
	struct snd_soc_device *socdev = wm8728_socdev;
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret;

	codec->control_data = spi;

	ret = wm8728_init(socdev, SND_SOC_SPI);
	if (ret < 0)
		dev_err(&spi->dev, "failed to initialise WM8728\n");

	return ret;
}

static int __devexit wm8728_spi_remove(struct spi_device *spi)
{
	return 0;
}

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

static int wm8728_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct wm8728_setup_data *setup;
	struct snd_soc_codec *codec;
	int ret = 0;

	setup = socdev->codec_data;
	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (codec == NULL)
		return -ENOMEM;

	socdev->card->codec = codec;
	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	wm8728_socdev = socdev;
	ret = -ENODEV;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	if (setup->i2c_address) {
		ret = wm8728_add_i2c_device(pdev, setup);
	}
#endif
#if defined(CONFIG_SPI_MASTER)
	if (setup->spi) {
		ret = spi_register_driver(&wm8728_spi_driver);
		if (ret != 0)
			printk(KERN_ERR "can't add spi driver");
	}
#endif

	if (ret != 0)
		kfree(codec);

	return ret;
}

/* power down chip */
static int wm8728_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;

	if (codec->control_data)
		wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);

	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_unregister_device(codec->control_data);
	i2c_del_driver(&wm8728_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&wm8728_spi_driver);
#endif
	kfree(codec);

	return 0;
}

struct snd_soc_codec_device soc_codec_dev_wm8728 = {
	.probe = 	wm8728_probe,
	.remove = 	wm8728_remove,
	.suspend = 	wm8728_suspend,
	.resume =	wm8728_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728);

static int __init wm8728_modinit(void)
{
	return snd_soc_register_dai(&wm8728_dai);
}
module_init(wm8728_modinit);

static void __exit wm8728_exit(void)
{
	snd_soc_unregister_dai(&wm8728_dai);
}
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
	32	struct snd_soc_codec_device soc_codec_dev_wm8728;
	33
	34	/*
	35	* We can't read the WM8728 register space so we cache them instead.
	36	* Note that the defaults here aren't the physical defaults, we latch
	37	* the volume update bits, mute the output and enable infinite zero
	38	* detect.
	39	*/
	40	static const u16 wm8728_reg_defaults[] = {
	41	0x1ff,
	42	0x1ff,
	43	0x001,
	44	0x100,
	45	};
	46
71cfc902 MB	47	static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
	48
	49	static const struct snd_kcontrol_new wm8728_snd_controls[] = {
	50
	51	SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
	52	0, 255, 0, wm8728_tlv),
	53
	54	SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
	55	};
	56
71cfc902 MB	57	/*
	58	* DAPM controls.
	59	*/
	60	static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
	61	SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
	62	SND_SOC_DAPM_OUTPUT("VOUTL"),
	63	SND_SOC_DAPM_OUTPUT("VOUTR"),
	64	};
	65
	66	static const struct snd_soc_dapm_route intercon[] = {
	67	{"VOUTL", NULL, "DAC"},
	68	{"VOUTR", NULL, "DAC"},
	69	};
	70
	71	static int wm8728_add_widgets(struct snd_soc_codec *codec)
	72	{
	73	snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets,
	74	ARRAY_SIZE(wm8728_dapm_widgets));
	75
	76	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
	77
71cfc902 MB	78	return 0;
	79	}
	80
	81	static int wm8728_mute(struct snd_soc_dai *dai, int mute)
	82	{
	83	struct snd_soc_codec *codec = dai->codec;
17a52fd6	84	u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
71cfc902 MB	85
71cfc902 MB	86	if (mute)
17a52fd6	87	snd_soc_write(codec, WM8728_DACCTL, mute_reg \| 1);
71cfc902	88	else
17a52fd6	89	snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);
71cfc902 MB	90
	91	return 0;
	92	}
	93
	94	static int wm8728_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	95	struct snd_pcm_hw_params *params,
dee89c4d MB	96	struct snd_soc_dai *dai)
71cfc902 MB	97	{
	98	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	99	struct snd_soc_device *socdev = rtd->socdev;
6627a653	100	struct snd_soc_codec *codec = socdev->card->codec;
17a52fd6	101	u16 dac = snd_soc_read(codec, WM8728_DACCTL);
71cfc902 MB	102
	103	dac &= ~0x18;
	104
	105	switch (params_format(params)) {
	106	case SNDRV_PCM_FORMAT_S16_LE:
	107	break;
	108	case SNDRV_PCM_FORMAT_S20_3LE:
	109	dac \|= 0x10;
	110	break;
	111	case SNDRV_PCM_FORMAT_S24_LE:
	112	dac \|= 0x08;
	113	break;
	114	default:
	115	return -EINVAL;
	116	}
	117
17a52fd6	118	snd_soc_write(codec, WM8728_DACCTL, dac);
71cfc902 MB	119
	120	return 0;
	121	}
	122
	123	static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
	124	unsigned int fmt)
	125	{
	126	struct snd_soc_codec *codec = codec_dai->codec;
17a52fd6	127	u16 iface = snd_soc_read(codec, WM8728_IFCTL);
71cfc902 MB	128
	129	/* Currently only I2S is supported by the driver, though the
	130	* hardware is more flexible.
	131	*/
	132	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	133	case SND_SOC_DAIFMT_I2S:
	134	iface \|= 1;
	135	break;
	136	default:
	137	return -EINVAL;
	138	}
	139
	140	/* The hardware only support full slave mode */
	141	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	142	case SND_SOC_DAIFMT_CBS_CFS:
	143	break;
	144	default:
	145	return -EINVAL;
	146	}
	147
	148	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	149	case SND_SOC_DAIFMT_NB_NF:
	150	iface &= ~0x22;
	151	break;
	152	case SND_SOC_DAIFMT_IB_NF:
	153	iface \|= 0x20;
	154	iface &= ~0x02;
	155	break;
	156	case SND_SOC_DAIFMT_NB_IF:
	157	iface \|= 0x02;
	158	iface &= ~0x20;
	159	break;
	160	case SND_SOC_DAIFMT_IB_IF:
	161	iface \|= 0x22;
	162	break;
	163	default:
	164	return -EINVAL;
	165	}
	166
17a52fd6	167	snd_soc_write(codec, WM8728_IFCTL, iface);
71cfc902 MB	168	return 0;
	169	}
	170
	171	static int wm8728_set_bias_level(struct snd_soc_codec *codec,
	172	enum snd_soc_bias_level level)
	173	{
	174	u16 reg;
	175	int i;
	176
	177	switch (level) {
	178	case SND_SOC_BIAS_ON:
	179	case SND_SOC_BIAS_PREPARE:
	180	case SND_SOC_BIAS_STANDBY:
	181	if (codec->bias_level == SND_SOC_BIAS_OFF) {
	182	/* Power everything up... */
17a52fd6 MB	183	reg = snd_soc_read(codec, WM8728_DACCTL);
17a52fd6 MB	184	snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
71cfc902 MB	185
	186	/* ..then sync in the register cache. */
	187	for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
17a52fd6 MB	188	snd_soc_write(codec, i,
17a52fd6 MB	189	snd_soc_read(codec, i));
71cfc902 MB	190	}
	191	break;
	192
	193	case SND_SOC_BIAS_OFF:
17a52fd6 MB	194	reg = snd_soc_read(codec, WM8728_DACCTL);
17a52fd6 MB	195	snd_soc_write(codec, WM8728_DACCTL, reg \| 0x4);
71cfc902 MB	196	break;
	197	}
	198	codec->bias_level = level;
	199	return 0;
	200	}
	201
	202	#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
	203
	204	#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	205	SNDRV_PCM_FMTBIT_S24_LE)
	206
6335d055 EM	207	static struct snd_soc_dai_ops wm8728_dai_ops = {
	208	.hw_params = wm8728_hw_params,
	209	.digital_mute = wm8728_mute,
	210	.set_fmt = wm8728_set_dai_fmt,
	211	};
	212
71cfc902 MB	213	struct snd_soc_dai wm8728_dai = {
	214	.name = "WM8728",
	215	.playback = {
	216	.stream_name = "Playback",
	217	.channels_min = 2,
	218	.channels_max = 2,
	219	.rates = WM8728_RATES,
	220	.formats = WM8728_FORMATS,
	221	},
6335d055	222	.ops = &wm8728_dai_ops,
71cfc902 MB	223	};
	224	EXPORT_SYMBOL_GPL(wm8728_dai);
	225
	226	static int wm8728_suspend(struct platform_device *pdev, pm_message_t state)
	227	{
	228	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	229	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	230
	231	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
	232
	233	return 0;
	234	}
	235
	236	static int wm8728_resume(struct platform_device *pdev)
	237	{
	238	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	239	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	240
	241	wm8728_set_bias_level(codec, codec->suspend_bias_level);
	242
	243	return 0;
	244	}
	245
	246	/*
	247	* initialise the WM8728 driver
	248	* register the mixer and dsp interfaces with the kernel
	249	*/
7084a42b MB	250	static int wm8728_init(struct snd_soc_device *socdev,
7084a42b MB	251	enum snd_soc_control_type control)
71cfc902	252	{
6627a653	253	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	254	int ret = 0;
	255
	256	codec->name = "WM8728";
	257	codec->owner = THIS_MODULE;
71cfc902 MB	258	codec->set_bias_level = wm8728_set_bias_level;
	259	codec->dai = &wm8728_dai;
	260	codec->num_dai = 1;
	261	codec->bias_level = SND_SOC_BIAS_OFF;
	262	codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults);
	263	codec->reg_cache = kmemdup(wm8728_reg_defaults,
	264	sizeof(wm8728_reg_defaults),
	265	GFP_KERNEL);
	266	if (codec->reg_cache == NULL)
	267	return -ENOMEM;
	268
7084a42b	269	ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
17a52fd6 MB	270	if (ret < 0) {
	271	printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
	272	ret);
	273	goto err;
	274	}
	275
71cfc902 MB	276	/* register pcms */
	277	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	278	if (ret < 0) {
	279	printk(KERN_ERR "wm8728: failed to create pcms\n");
17a52fd6	280	goto err;
71cfc902 MB	281	}
	282
	283	/* power on device */
	284	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	285
3e8e1952 IM	286	snd_soc_add_controls(codec, wm8728_snd_controls,
3e8e1952 IM	287	ARRAY_SIZE(wm8728_snd_controls));
71cfc902	288	wm8728_add_widgets(codec);
71cfc902 MB	289
	290	return ret;
	291
17a52fd6	292	err:
71cfc902 MB	293	kfree(codec->reg_cache);
	294	return ret;
	295	}
	296
	297	static struct snd_soc_device *wm8728_socdev;
	298
	299	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	300
	301	/*
	302	* WM8728 2 wire address is determined by GPIO5
	303	* state during powerup.
	304	* low = 0x1a
	305	* high = 0x1b
	306	*/
	307
	308	static int wm8728_i2c_probe(struct i2c_client *i2c,
	309	const struct i2c_device_id *id)
	310	{
	311	struct snd_soc_device *socdev = wm8728_socdev;
6627a653	312	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	313	int ret;
	314
	315	i2c_set_clientdata(i2c, codec);
	316	codec->control_data = i2c;
	317
7084a42b	318	ret = wm8728_init(socdev, SND_SOC_I2C);
71cfc902 MB	319	if (ret < 0)
	320	pr_err("failed to initialise WM8728\n");
	321
	322	return ret;
	323	}
	324
	325	static int wm8728_i2c_remove(struct i2c_client *client)
	326	{
	327	struct snd_soc_codec *codec = i2c_get_clientdata(client);
	328	kfree(codec->reg_cache);
	329	return 0;
	330	}
	331
	332	static const struct i2c_device_id wm8728_i2c_id[] = {
	333	{ "wm8728", 0 },
	334	{ }
	335	};
	336	MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
	337
	338	static struct i2c_driver wm8728_i2c_driver = {
	339	.driver = {
	340	.name = "WM8728 I2C Codec",
	341	.owner = THIS_MODULE,
	342	},
	343	.probe = wm8728_i2c_probe,
	344	.remove = wm8728_i2c_remove,
	345	.id_table = wm8728_i2c_id,
	346	};
	347
	348	static int wm8728_add_i2c_device(struct platform_device *pdev,
	349	const struct wm8728_setup_data *setup)
	350	{
	351	struct i2c_board_info info;
	352	struct i2c_adapter *adapter;
	353	struct i2c_client *client;
	354	int ret;
	355
	356	ret = i2c_add_driver(&wm8728_i2c_driver);
	357	if (ret != 0) {
	358	dev_err(&pdev->dev, "can't add i2c driver\n");
	359	return ret;
	360	}
	361
	362	memset(&info, 0, sizeof(struct i2c_board_info));
	363	info.addr = setup->i2c_address;
	364	strlcpy(info.type, "wm8728", I2C_NAME_SIZE);
	365
	366	adapter = i2c_get_adapter(setup->i2c_bus);
	367	if (!adapter) {
	368	dev_err(&pdev->dev, "can't get i2c adapter %d\n",
	369	setup->i2c_bus);
	370	goto err_driver;
	371	}
	372
	373	client = i2c_new_device(adapter, &info);
	374	i2c_put_adapter(adapter);
	375	if (!client) {
	376	dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
	377	(unsigned int)info.addr);
	378	goto err_driver;
	379	}
	380
	381	return 0;
	382
383	err_driver:
384	i2c_del_driver(&wm8728_i2c_driver);
385	return -ENODEV;
386	}
387	#endif
388
389	#if defined(CONFIG_SPI_MASTER)
390	static int __devinit wm8728_spi_probe(struct spi_device *spi)
391	{
392	struct snd_soc_device *socdev = wm8728_socdev;
6627a653	393	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	394	int ret;
	395
	396	codec->control_data = spi;
	397
7084a42b	398	ret = wm8728_init(socdev, SND_SOC_SPI);
71cfc902 MB	399	if (ret < 0)
	400	dev_err(&spi->dev, "failed to initialise WM8728\n");
	401
	402	return ret;
	403	}
	404
	405	static int __devexit wm8728_spi_remove(struct spi_device *spi)
	406	{
	407	return 0;
	408	}
	409
	410	static struct spi_driver wm8728_spi_driver = {
	411	.driver = {
	412	.name = "wm8728",
	413	.bus = &spi_bus_type,
	414	.owner = THIS_MODULE,
	415	},
	416	.probe = wm8728_spi_probe,
	417	.remove = __devexit_p(wm8728_spi_remove),
	418	};
71cfc902 MB	419	#endif /* CONFIG_SPI_MASTER */
	420
	421	static int wm8728_probe(struct platform_device *pdev)
	422	{
	423	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	424	struct wm8728_setup_data *setup;
	425	struct snd_soc_codec *codec;
	426	int ret = 0;
	427
	428	setup = socdev->codec_data;
	429	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	430	if (codec == NULL)
	431	return -ENOMEM;
	432
6627a653	433	socdev->card->codec = codec;
71cfc902 MB	434	mutex_init(&codec->mutex);
	435	INIT_LIST_HEAD(&codec->dapm_widgets);
	436	INIT_LIST_HEAD(&codec->dapm_paths);
	437
	438	wm8728_socdev = socdev;
	439	ret = -ENODEV;
	440
	441	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	442	if (setup->i2c_address) {
71cfc902 MB	443	ret = wm8728_add_i2c_device(pdev, setup);
	444	}
	445	#endif
	446	#if defined(CONFIG_SPI_MASTER)
	447	if (setup->spi) {
71cfc902 MB	448	ret = spi_register_driver(&wm8728_spi_driver);
	449	if (ret != 0)
	450	printk(KERN_ERR "can't add spi driver");
	451	}
	452	#endif
	453
	454	if (ret != 0)
	455	kfree(codec);
	456
	457	return ret;
	458	}
	459
	460	/* power down chip */
	461	static int wm8728_remove(struct platform_device *pdev)
	462	{
	463	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	464	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	465
	466	if (codec->control_data)
	467	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
	468
	469	snd_soc_free_pcms(socdev);
	470	snd_soc_dapm_free(socdev);
	471	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	472	i2c_unregister_device(codec->control_data);
	473	i2c_del_driver(&wm8728_i2c_driver);
	474	#endif
	475	#if defined(CONFIG_SPI_MASTER)
	476	spi_unregister_driver(&wm8728_spi_driver);
	477	#endif
	478	kfree(codec);
	479
	480	return 0;
	481	}
	482
	483	struct snd_soc_codec_device soc_codec_dev_wm8728 = {
	484	.probe = wm8728_probe,
	485	.remove = wm8728_remove,
	486	.suspend = wm8728_suspend,
	487	.resume = wm8728_resume,
	488	};
	489	EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728);
	490
c9b3a40f	491	static int __init wm8728_modinit(void)
64089b84 MB	492	{
	493	return snd_soc_register_dai(&wm8728_dai);
	494	}
	495	module_init(wm8728_modinit);
	496
	497	static void __exit wm8728_exit(void)
	498	{
	499	snd_soc_unregister_dai(&wm8728_dai);
	500	}
	501	module_exit(wm8728_exit);
	502
71cfc902 MB	503	MODULE_DESCRIPTION("ASoC WM8728 driver");
	504	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	505	MODULE_LICENSE("GPL");