[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 <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));

	snd_soc_dapm_new_widgets(codec);

	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);
	ret = snd_soc_init_card(socdev);
	if (ret < 0) {
		printk(KERN_ERR "wm8728: failed to register card\n");
		goto card_err;
	}

	return ret;

card_err:
	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);
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>
	21	#include <sound/core.h>
	22	#include <sound/pcm.h>
	23	#include <sound/pcm_params.h>
	24	#include <sound/soc.h>
	25	#include <sound/soc-dapm.h>
	26	#include <sound/initval.h>
	27	#include <sound/tlv.h>
	28
	29	#include "wm8728.h"
	30
	31	struct snd_soc_codec_device soc_codec_dev_wm8728;
	32
	33	/*
	34	* We can't read the WM8728 register space so we cache them instead.
	35	* Note that the defaults here aren't the physical defaults, we latch
	36	* the volume update bits, mute the output and enable infinite zero
	37	* detect.
	38	*/
	39	static const u16 wm8728_reg_defaults[] = {
	40	0x1ff,
	41	0x1ff,
	42	0x001,
	43	0x100,
	44	};
	45
71cfc902 MB	46	static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
	47
	48	static const struct snd_kcontrol_new wm8728_snd_controls[] = {
	49
	50	SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
	51	0, 255, 0, wm8728_tlv),
	52
	53	SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
	54	};
	55
71cfc902 MB	56	/*
	57	* DAPM controls.
	58	*/
	59	static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
	60	SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
	61	SND_SOC_DAPM_OUTPUT("VOUTL"),
	62	SND_SOC_DAPM_OUTPUT("VOUTR"),
	63	};
	64
	65	static const struct snd_soc_dapm_route intercon[] = {
	66	{"VOUTL", NULL, "DAC"},
	67	{"VOUTR", NULL, "DAC"},
	68	};
	69
	70	static int wm8728_add_widgets(struct snd_soc_codec *codec)
	71	{
	72	snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets,
	73	ARRAY_SIZE(wm8728_dapm_widgets));
	74
	75	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
	76
	77	snd_soc_dapm_new_widgets(codec);
	78
	79	return 0;
	80	}
	81
	82	static int wm8728_mute(struct snd_soc_dai *dai, int mute)
	83	{
	84	struct snd_soc_codec *codec = dai->codec;
17a52fd6	85	u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
71cfc902 MB	86
71cfc902 MB	87	if (mute)
17a52fd6	88	snd_soc_write(codec, WM8728_DACCTL, mute_reg \| 1);
71cfc902	89	else
17a52fd6	90	snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);
71cfc902 MB	91
	92	return 0;
	93	}
	94
	95	static int wm8728_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	96	struct snd_pcm_hw_params *params,
dee89c4d MB	97	struct snd_soc_dai *dai)
71cfc902 MB	98	{
	99	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	100	struct snd_soc_device *socdev = rtd->socdev;
6627a653	101	struct snd_soc_codec *codec = socdev->card->codec;
17a52fd6	102	u16 dac = snd_soc_read(codec, WM8728_DACCTL);
71cfc902 MB	103
	104	dac &= ~0x18;
	105
	106	switch (params_format(params)) {
	107	case SNDRV_PCM_FORMAT_S16_LE:
	108	break;
	109	case SNDRV_PCM_FORMAT_S20_3LE:
	110	dac \|= 0x10;
	111	break;
	112	case SNDRV_PCM_FORMAT_S24_LE:
	113	dac \|= 0x08;
	114	break;
	115	default:
	116	return -EINVAL;
	117	}
	118
17a52fd6	119	snd_soc_write(codec, WM8728_DACCTL, dac);
71cfc902 MB	120
	121	return 0;
	122	}
	123
	124	static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
	125	unsigned int fmt)
	126	{
	127	struct snd_soc_codec *codec = codec_dai->codec;
17a52fd6	128	u16 iface = snd_soc_read(codec, WM8728_IFCTL);
71cfc902 MB	129
	130	/* Currently only I2S is supported by the driver, though the
	131	* hardware is more flexible.
	132	*/
	133	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	134	case SND_SOC_DAIFMT_I2S:
	135	iface \|= 1;
	136	break;
	137	default:
	138	return -EINVAL;
	139	}
	140
	141	/* The hardware only support full slave mode */
	142	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	143	case SND_SOC_DAIFMT_CBS_CFS:
	144	break;
	145	default:
	146	return -EINVAL;
	147	}
	148
	149	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	150	case SND_SOC_DAIFMT_NB_NF:
	151	iface &= ~0x22;
	152	break;
	153	case SND_SOC_DAIFMT_IB_NF:
	154	iface \|= 0x20;
	155	iface &= ~0x02;
	156	break;
	157	case SND_SOC_DAIFMT_NB_IF:
	158	iface \|= 0x02;
	159	iface &= ~0x20;
	160	break;
	161	case SND_SOC_DAIFMT_IB_IF:
	162	iface \|= 0x22;
	163	break;
	164	default:
	165	return -EINVAL;
	166	}
	167
17a52fd6	168	snd_soc_write(codec, WM8728_IFCTL, iface);
71cfc902 MB	169	return 0;
	170	}
	171
	172	static int wm8728_set_bias_level(struct snd_soc_codec *codec,
	173	enum snd_soc_bias_level level)
	174	{
	175	u16 reg;
	176	int i;
	177
	178	switch (level) {
	179	case SND_SOC_BIAS_ON:
	180	case SND_SOC_BIAS_PREPARE:
	181	case SND_SOC_BIAS_STANDBY:
	182	if (codec->bias_level == SND_SOC_BIAS_OFF) {
	183	/* Power everything up... */
17a52fd6 MB	184	reg = snd_soc_read(codec, WM8728_DACCTL);
17a52fd6 MB	185	snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
71cfc902 MB	186
	187	/* ..then sync in the register cache. */
	188	for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
17a52fd6 MB	189	snd_soc_write(codec, i,
17a52fd6 MB	190	snd_soc_read(codec, i));
71cfc902 MB	191	}
	192	break;
	193
	194	case SND_SOC_BIAS_OFF:
17a52fd6 MB	195	reg = snd_soc_read(codec, WM8728_DACCTL);
17a52fd6 MB	196	snd_soc_write(codec, WM8728_DACCTL, reg \| 0x4);
71cfc902 MB	197	break;
	198	}
	199	codec->bias_level = level;
	200	return 0;
	201	}
	202
	203	#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
	204
	205	#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	206	SNDRV_PCM_FMTBIT_S24_LE)
	207
6335d055 EM	208	static struct snd_soc_dai_ops wm8728_dai_ops = {
	209	.hw_params = wm8728_hw_params,
	210	.digital_mute = wm8728_mute,
	211	.set_fmt = wm8728_set_dai_fmt,
	212	};
	213
71cfc902 MB	214	struct snd_soc_dai wm8728_dai = {
	215	.name = "WM8728",
	216	.playback = {
	217	.stream_name = "Playback",
	218	.channels_min = 2,
	219	.channels_max = 2,
	220	.rates = WM8728_RATES,
	221	.formats = WM8728_FORMATS,
	222	},
6335d055	223	.ops = &wm8728_dai_ops,
71cfc902 MB	224	};
	225	EXPORT_SYMBOL_GPL(wm8728_dai);
	226
	227	static int wm8728_suspend(struct platform_device *pdev, pm_message_t state)
	228	{
	229	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	230	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	231
	232	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
	233
	234	return 0;
	235	}
	236
	237	static int wm8728_resume(struct platform_device *pdev)
	238	{
	239	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	240	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	241
	242	wm8728_set_bias_level(codec, codec->suspend_bias_level);
	243
	244	return 0;
	245	}
	246
	247	/*
	248	* initialise the WM8728 driver
	249	* register the mixer and dsp interfaces with the kernel
	250	*/
7084a42b MB	251	static int wm8728_init(struct snd_soc_device *socdev,
7084a42b MB	252	enum snd_soc_control_type control)
71cfc902	253	{
6627a653	254	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	255	int ret = 0;
	256
	257	codec->name = "WM8728";
	258	codec->owner = THIS_MODULE;
71cfc902 MB	259	codec->set_bias_level = wm8728_set_bias_level;
	260	codec->dai = &wm8728_dai;
	261	codec->num_dai = 1;
	262	codec->bias_level = SND_SOC_BIAS_OFF;
	263	codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults);
	264	codec->reg_cache = kmemdup(wm8728_reg_defaults,
	265	sizeof(wm8728_reg_defaults),
	266	GFP_KERNEL);
	267	if (codec->reg_cache == NULL)
	268	return -ENOMEM;
	269
7084a42b	270	ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
17a52fd6 MB	271	if (ret < 0) {
	272	printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
	273	ret);
	274	goto err;
	275	}
	276
71cfc902 MB	277	/* register pcms */
	278	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	279	if (ret < 0) {
	280	printk(KERN_ERR "wm8728: failed to create pcms\n");
17a52fd6	281	goto err;
71cfc902 MB	282	}
	283
	284	/* power on device */
	285	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	286
3e8e1952 IM	287	snd_soc_add_controls(codec, wm8728_snd_controls,
3e8e1952 IM	288	ARRAY_SIZE(wm8728_snd_controls));
71cfc902	289	wm8728_add_widgets(codec);
968a6025	290	ret = snd_soc_init_card(socdev);
71cfc902 MB	291	if (ret < 0) {
	292	printk(KERN_ERR "wm8728: failed to register card\n");
	293	goto card_err;
	294	}
	295
	296	return ret;
	297
	298	card_err:
	299	snd_soc_free_pcms(socdev);
	300	snd_soc_dapm_free(socdev);
17a52fd6	301	err:
71cfc902 MB	302	kfree(codec->reg_cache);
	303	return ret;
	304	}
	305
	306	static struct snd_soc_device *wm8728_socdev;
	307
	308	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	309
	310	/*
	311	* WM8728 2 wire address is determined by GPIO5
	312	* state during powerup.
	313	* low = 0x1a
	314	* high = 0x1b
	315	*/
	316
	317	static int wm8728_i2c_probe(struct i2c_client *i2c,
	318	const struct i2c_device_id *id)
	319	{
	320	struct snd_soc_device *socdev = wm8728_socdev;
6627a653	321	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	322	int ret;
	323
	324	i2c_set_clientdata(i2c, codec);
	325	codec->control_data = i2c;
	326
7084a42b	327	ret = wm8728_init(socdev, SND_SOC_I2C);
71cfc902 MB	328	if (ret < 0)
	329	pr_err("failed to initialise WM8728\n");
	330
	331	return ret;
	332	}
	333
	334	static int wm8728_i2c_remove(struct i2c_client *client)
	335	{
	336	struct snd_soc_codec *codec = i2c_get_clientdata(client);
	337	kfree(codec->reg_cache);
	338	return 0;
	339	}
	340
	341	static const struct i2c_device_id wm8728_i2c_id[] = {
	342	{ "wm8728", 0 },
	343	{ }
	344	};
	345	MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
	346
	347	static struct i2c_driver wm8728_i2c_driver = {
	348	.driver = {
	349	.name = "WM8728 I2C Codec",
	350	.owner = THIS_MODULE,
	351	},
	352	.probe = wm8728_i2c_probe,
	353	.remove = wm8728_i2c_remove,
	354	.id_table = wm8728_i2c_id,
	355	};
	356
	357	static int wm8728_add_i2c_device(struct platform_device *pdev,
	358	const struct wm8728_setup_data *setup)
	359	{
	360	struct i2c_board_info info;
	361	struct i2c_adapter *adapter;
	362	struct i2c_client *client;
	363	int ret;
	364
	365	ret = i2c_add_driver(&wm8728_i2c_driver);
	366	if (ret != 0) {
	367	dev_err(&pdev->dev, "can't add i2c driver\n");
	368	return ret;
	369	}
	370
	371	memset(&info, 0, sizeof(struct i2c_board_info));
	372	info.addr = setup->i2c_address;
	373	strlcpy(info.type, "wm8728", I2C_NAME_SIZE);
	374
	375	adapter = i2c_get_adapter(setup->i2c_bus);
	376	if (!adapter) {
	377	dev_err(&pdev->dev, "can't get i2c adapter %d\n",
	378	setup->i2c_bus);
	379	goto err_driver;
	380	}
	381
	382	client = i2c_new_device(adapter, &info);
	383	i2c_put_adapter(adapter);
	384	if (!client) {
	385	dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
	386	(unsigned int)info.addr);
	387	goto err_driver;
	388	}
	389
	390	return 0;
	391
392	err_driver:
393	i2c_del_driver(&wm8728_i2c_driver);
394	return -ENODEV;
395	}
396	#endif
397
398	#if defined(CONFIG_SPI_MASTER)
399	static int __devinit wm8728_spi_probe(struct spi_device *spi)
400	{
401	struct snd_soc_device *socdev = wm8728_socdev;
6627a653	402	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	403	int ret;
	404
	405	codec->control_data = spi;
	406
7084a42b	407	ret = wm8728_init(socdev, SND_SOC_SPI);
71cfc902 MB	408	if (ret < 0)
	409	dev_err(&spi->dev, "failed to initialise WM8728\n");
	410
	411	return ret;
	412	}
	413
	414	static int __devexit wm8728_spi_remove(struct spi_device *spi)
	415	{
	416	return 0;
	417	}
	418
	419	static struct spi_driver wm8728_spi_driver = {
	420	.driver = {
	421	.name = "wm8728",
	422	.bus = &spi_bus_type,
	423	.owner = THIS_MODULE,
	424	},
	425	.probe = wm8728_spi_probe,
	426	.remove = __devexit_p(wm8728_spi_remove),
	427	};
71cfc902 MB	428	#endif /* CONFIG_SPI_MASTER */
	429
	430	static int wm8728_probe(struct platform_device *pdev)
	431	{
	432	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	433	struct wm8728_setup_data *setup;
	434	struct snd_soc_codec *codec;
	435	int ret = 0;
	436
	437	setup = socdev->codec_data;
	438	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	439	if (codec == NULL)
	440	return -ENOMEM;
	441
6627a653	442	socdev->card->codec = codec;
71cfc902 MB	443	mutex_init(&codec->mutex);
	444	INIT_LIST_HEAD(&codec->dapm_widgets);
	445	INIT_LIST_HEAD(&codec->dapm_paths);
	446
	447	wm8728_socdev = socdev;
	448	ret = -ENODEV;
	449
	450	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	451	if (setup->i2c_address) {
71cfc902 MB	452	ret = wm8728_add_i2c_device(pdev, setup);
	453	}
	454	#endif
	455	#if defined(CONFIG_SPI_MASTER)
	456	if (setup->spi) {
71cfc902 MB	457	ret = spi_register_driver(&wm8728_spi_driver);
	458	if (ret != 0)
	459	printk(KERN_ERR "can't add spi driver");
	460	}
	461	#endif
	462
	463	if (ret != 0)
	464	kfree(codec);
	465
	466	return ret;
	467	}
	468
	469	/* power down chip */
	470	static int wm8728_remove(struct platform_device *pdev)
	471	{
	472	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	473	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	474
	475	if (codec->control_data)
	476	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
	477
	478	snd_soc_free_pcms(socdev);
	479	snd_soc_dapm_free(socdev);
	480	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	481	i2c_unregister_device(codec->control_data);
	482	i2c_del_driver(&wm8728_i2c_driver);
	483	#endif
	484	#if defined(CONFIG_SPI_MASTER)
	485	spi_unregister_driver(&wm8728_spi_driver);
	486	#endif
	487	kfree(codec);
	488
	489	return 0;
	490	}
	491
	492	struct snd_soc_codec_device soc_codec_dev_wm8728 = {
	493	.probe = wm8728_probe,
	494	.remove = wm8728_remove,
	495	.suspend = wm8728_suspend,
	496	.resume = wm8728_resume,
	497	};
	498	EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728);
	499
c9b3a40f	500	static int __init wm8728_modinit(void)
64089b84 MB	501	{
	502	return snd_soc_register_dai(&wm8728_dai);
	503	}
	504	module_init(wm8728_modinit);
	505
	506	static void __exit wm8728_exit(void)
	507	{
	508	snd_soc_unregister_dai(&wm8728_dai);
	509	}
	510	module_exit(wm8728_exit);
	511
71cfc902 MB	512	MODULE_DESCRIPTION("ASoC WM8728 driver");
	513	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	514	MODULE_LICENSE("GPL");