[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 inline unsigned int wm8728_read_reg_cache(struct snd_soc_codec *codec,
	unsigned int reg)
{
	u16 *cache = codec->reg_cache;
	BUG_ON(reg >= ARRAY_SIZE(wm8728_reg_defaults));
	return cache[reg];
}

static inline void wm8728_write_reg_cache(struct snd_soc_codec *codec,
	u16 reg, unsigned int value)
{
	u16 *cache = codec->reg_cache;
	BUG_ON(reg >= ARRAY_SIZE(wm8728_reg_defaults));
	cache[reg] = value;
}

/*
 * write to the WM8728 register space
 */
static int wm8728_write(struct snd_soc_codec *codec, unsigned int reg,
	unsigned int value)
{
	u8 data[2];

	/* data is
	 *   D15..D9 WM8728 register offset
	 *   D8...D0 register data
	 */
	data[0] = (reg << 1) | ((value >> 8) & 0x0001);
	data[1] = value & 0x00ff;

	wm8728_write_reg_cache(codec, reg, value);

	if (codec->hw_write(codec->control_data, data, 2) == 2)
		return 0;
	else
		return -EIO;
}

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 = wm8728_read_reg_cache(codec, WM8728_DACCTL);

	if (mute)
		wm8728_write(codec, WM8728_DACCTL, mute_reg | 1);
	else
		wm8728_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 = wm8728_read_reg_cache(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;
	}

	wm8728_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 = wm8728_read_reg_cache(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;
	}

	wm8728_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 = wm8728_read_reg_cache(codec, WM8728_DACCTL);
			wm8728_write(codec, WM8728_DACCTL, reg & ~0x4);

			/* ..then sync in the register cache. */
			for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
				wm8728_write(codec, i,
					     wm8728_read_reg_cache(codec, i));
		}
		break;

	case SND_SOC_BIAS_OFF:
		reg = wm8728_read_reg_cache(codec, WM8728_DACCTL);
		wm8728_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)

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 = {
		 .hw_params = wm8728_hw_params,
		 .digital_mute = wm8728_mute,
		 .set_fmt = wm8728_set_dai_fmt,
	}
};
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)
{
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret = 0;

	codec->name = "WM8728";
	codec->owner = THIS_MODULE;
	codec->read = wm8728_read_reg_cache;
	codec->write = wm8728_write;
	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;

	/* 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 pcm_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);
pcm_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);
	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);
	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),
};

static int wm8728_spi_write(struct spi_device *spi, const char *data, int len)
{
	struct spi_transfer t;
	struct spi_message m;
	u8 msg[2];

	if (len <= 0)
		return 0;

	msg[0] = data[0];
	msg[1] = data[1];

	spi_message_init(&m);
	memset(&t, 0, (sizeof t));

	t.tx_buf = &msg[0];
	t.len = len;

	spi_message_add_tail(&t, &m);
	spi_sync(spi, &m);

	return len;
}
#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) {
		codec->hw_write = (hw_write_t)i2c_master_send;
		ret = wm8728_add_i2c_device(pdev, setup);
	}
#endif
#if defined(CONFIG_SPI_MASTER)
	if (setup->spi) {
		codec->hw_write = (hw_write_t)wm8728_spi_write;
		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
	46	static inline unsigned int wm8728_read_reg_cache(struct snd_soc_codec *codec,
	47	unsigned int reg)
	48	{
	49	u16 *cache = codec->reg_cache;
91432e97	50	BUG_ON(reg >= ARRAY_SIZE(wm8728_reg_defaults));
71cfc902 MB	51	return cache[reg];
	52	}
	53
	54	static inline void wm8728_write_reg_cache(struct snd_soc_codec *codec,
	55	u16 reg, unsigned int value)
	56	{
	57	u16 *cache = codec->reg_cache;
91432e97	58	BUG_ON(reg >= ARRAY_SIZE(wm8728_reg_defaults));
71cfc902 MB	59	cache[reg] = value;
	60	}
	61
	62	/*
	63	* write to the WM8728 register space
	64	*/
	65	static int wm8728_write(struct snd_soc_codec *codec, unsigned int reg,
	66	unsigned int value)
	67	{
	68	u8 data[2];
	69
	70	/* data is
	71	* D15..D9 WM8728 register offset
	72	* D8...D0 register data
	73	*/
	74	data[0] = (reg << 1) \| ((value >> 8) & 0x0001);
	75	data[1] = value & 0x00ff;
	76
	77	wm8728_write_reg_cache(codec, reg, value);
	78
	79	if (codec->hw_write(codec->control_data, data, 2) == 2)
	80	return 0;
	81	else
	82	return -EIO;
	83	}
	84
	85	static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
	86
	87	static const struct snd_kcontrol_new wm8728_snd_controls[] = {
	88
	89	SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
	90	0, 255, 0, wm8728_tlv),
	91
	92	SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
	93	};
	94
71cfc902 MB	95	/*
	96	* DAPM controls.
	97	*/
	98	static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
	99	SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
	100	SND_SOC_DAPM_OUTPUT("VOUTL"),
	101	SND_SOC_DAPM_OUTPUT("VOUTR"),
	102	};
	103
	104	static const struct snd_soc_dapm_route intercon[] = {
	105	{"VOUTL", NULL, "DAC"},
	106	{"VOUTR", NULL, "DAC"},
	107	};
	108
	109	static int wm8728_add_widgets(struct snd_soc_codec *codec)
	110	{
	111	snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets,
	112	ARRAY_SIZE(wm8728_dapm_widgets));
	113
	114	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
	115
	116	snd_soc_dapm_new_widgets(codec);
	117
	118	return 0;
	119	}
	120
	121	static int wm8728_mute(struct snd_soc_dai *dai, int mute)
	122	{
	123	struct snd_soc_codec *codec = dai->codec;
	124	u16 mute_reg = wm8728_read_reg_cache(codec, WM8728_DACCTL);
	125
	126	if (mute)
	127	wm8728_write(codec, WM8728_DACCTL, mute_reg \| 1);
	128	else
	129	wm8728_write(codec, WM8728_DACCTL, mute_reg & ~1);
	130
	131	return 0;
	132	}
	133
	134	static int wm8728_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	135	struct snd_pcm_hw_params *params,
dee89c4d MB	136	struct snd_soc_dai *dai)
71cfc902 MB	137	{
	138	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	139	struct snd_soc_device *socdev = rtd->socdev;
6627a653	140	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	141	u16 dac = wm8728_read_reg_cache(codec, WM8728_DACCTL);
	142
	143	dac &= ~0x18;
	144
	145	switch (params_format(params)) {
	146	case SNDRV_PCM_FORMAT_S16_LE:
	147	break;
	148	case SNDRV_PCM_FORMAT_S20_3LE:
	149	dac \|= 0x10;
	150	break;
	151	case SNDRV_PCM_FORMAT_S24_LE:
	152	dac \|= 0x08;
	153	break;
	154	default:
	155	return -EINVAL;
	156	}
	157
	158	wm8728_write(codec, WM8728_DACCTL, dac);
	159
	160	return 0;
	161	}
	162
	163	static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
	164	unsigned int fmt)
	165	{
	166	struct snd_soc_codec *codec = codec_dai->codec;
	167	u16 iface = wm8728_read_reg_cache(codec, WM8728_IFCTL);
	168
	169	/* Currently only I2S is supported by the driver, though the
	170	* hardware is more flexible.
	171	*/
	172	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	173	case SND_SOC_DAIFMT_I2S:
	174	iface \|= 1;
	175	break;
	176	default:
	177	return -EINVAL;
	178	}
	179
	180	/* The hardware only support full slave mode */
	181	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	182	case SND_SOC_DAIFMT_CBS_CFS:
	183	break;
	184	default:
	185	return -EINVAL;
	186	}
	187
	188	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	189	case SND_SOC_DAIFMT_NB_NF:
	190	iface &= ~0x22;
	191	break;
	192	case SND_SOC_DAIFMT_IB_NF:
	193	iface \|= 0x20;
	194	iface &= ~0x02;
	195	break;
	196	case SND_SOC_DAIFMT_NB_IF:
	197	iface \|= 0x02;
	198	iface &= ~0x20;
	199	break;
	200	case SND_SOC_DAIFMT_IB_IF:
	201	iface \|= 0x22;
	202	break;
	203	default:
	204	return -EINVAL;
205	}
206
207	wm8728_write(codec, WM8728_IFCTL, iface);
208	return 0;
209	}
210
211	static int wm8728_set_bias_level(struct snd_soc_codec *codec,
212	enum snd_soc_bias_level level)
213	{
214	u16 reg;
215	int i;
216
217	switch (level) {
218	case SND_SOC_BIAS_ON:
219	case SND_SOC_BIAS_PREPARE:
220	case SND_SOC_BIAS_STANDBY:
221	if (codec->bias_level == SND_SOC_BIAS_OFF) {
222	/* Power everything up... */
223	reg = wm8728_read_reg_cache(codec, WM8728_DACCTL);
224	wm8728_write(codec, WM8728_DACCTL, reg & ~0x4);
225
226	/* ..then sync in the register cache. */
227	for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
228	wm8728_write(codec, i,
229	wm8728_read_reg_cache(codec, i));
230	}
231	break;
232
233	case SND_SOC_BIAS_OFF:
234	reg = wm8728_read_reg_cache(codec, WM8728_DACCTL);
235	wm8728_write(codec, WM8728_DACCTL, reg \| 0x4);
236	break;
237	}
238	codec->bias_level = level;
239	return 0;
240	}
241
242	#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
243
244	#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
245	SNDRV_PCM_FMTBIT_S24_LE)
246
247	struct snd_soc_dai wm8728_dai = {
248	.name = "WM8728",
249	.playback = {
250	.stream_name = "Playback",
251	.channels_min = 2,
252	.channels_max = 2,
253	.rates = WM8728_RATES,
254	.formats = WM8728_FORMATS,
255	},
256	.ops = {
257	.hw_params = wm8728_hw_params,
71cfc902 MB	258	.digital_mute = wm8728_mute,
	259	.set_fmt = wm8728_set_dai_fmt,
	260	}
	261	};
	262	EXPORT_SYMBOL_GPL(wm8728_dai);
	263
	264	static int wm8728_suspend(struct platform_device *pdev, pm_message_t state)
	265	{
	266	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	267	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	268
	269	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
	270
	271	return 0;
	272	}
	273
	274	static int wm8728_resume(struct platform_device *pdev)
	275	{
	276	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	277	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	278
	279	wm8728_set_bias_level(codec, codec->suspend_bias_level);
	280
	281	return 0;
	282	}
	283
	284	/*
	285	* initialise the WM8728 driver
	286	* register the mixer and dsp interfaces with the kernel
	287	*/
	288	static int wm8728_init(struct snd_soc_device *socdev)
	289	{
6627a653	290	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	291	int ret = 0;
	292
	293	codec->name = "WM8728";
	294	codec->owner = THIS_MODULE;
	295	codec->read = wm8728_read_reg_cache;
	296	codec->write = wm8728_write;
	297	codec->set_bias_level = wm8728_set_bias_level;
	298	codec->dai = &wm8728_dai;
	299	codec->num_dai = 1;
	300	codec->bias_level = SND_SOC_BIAS_OFF;
	301	codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults);
	302	codec->reg_cache = kmemdup(wm8728_reg_defaults,
	303	sizeof(wm8728_reg_defaults),
	304	GFP_KERNEL);
	305	if (codec->reg_cache == NULL)
	306	return -ENOMEM;
	307
	308	/* register pcms */
	309	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	310	if (ret < 0) {
	311	printk(KERN_ERR "wm8728: failed to create pcms\n");
	312	goto pcm_err;
	313	}
	314
	315	/* power on device */
	316	wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	317
3e8e1952 IM	318	snd_soc_add_controls(codec, wm8728_snd_controls,
3e8e1952 IM	319	ARRAY_SIZE(wm8728_snd_controls));
71cfc902	320	wm8728_add_widgets(codec);
968a6025	321	ret = snd_soc_init_card(socdev);
71cfc902 MB	322	if (ret < 0) {
	323	printk(KERN_ERR "wm8728: failed to register card\n");
	324	goto card_err;
	325	}
	326
	327	return ret;
	328
	329	card_err:
	330	snd_soc_free_pcms(socdev);
	331	snd_soc_dapm_free(socdev);
	332	pcm_err:
	333	kfree(codec->reg_cache);
	334	return ret;
	335	}
	336
	337	static struct snd_soc_device *wm8728_socdev;
	338
	339	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	340
	341	/*
	342	* WM8728 2 wire address is determined by GPIO5
	343	* state during powerup.
	344	* low = 0x1a
	345	* high = 0x1b
	346	*/
	347
	348	static int wm8728_i2c_probe(struct i2c_client *i2c,
	349	const struct i2c_device_id *id)
	350	{
	351	struct snd_soc_device *socdev = wm8728_socdev;
6627a653	352	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	353	int ret;
	354
	355	i2c_set_clientdata(i2c, codec);
	356	codec->control_data = i2c;
	357
	358	ret = wm8728_init(socdev);
	359	if (ret < 0)
	360	pr_err("failed to initialise WM8728\n");
	361
	362	return ret;
	363	}
	364
	365	static int wm8728_i2c_remove(struct i2c_client *client)
	366	{
	367	struct snd_soc_codec *codec = i2c_get_clientdata(client);
	368	kfree(codec->reg_cache);
	369	return 0;
	370	}
	371
	372	static const struct i2c_device_id wm8728_i2c_id[] = {
	373	{ "wm8728", 0 },
	374	{ }
	375	};
	376	MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
	377
	378	static struct i2c_driver wm8728_i2c_driver = {
	379	.driver = {
	380	.name = "WM8728 I2C Codec",
	381	.owner = THIS_MODULE,
	382	},
	383	.probe = wm8728_i2c_probe,
	384	.remove = wm8728_i2c_remove,
	385	.id_table = wm8728_i2c_id,
	386	};
	387
	388	static int wm8728_add_i2c_device(struct platform_device *pdev,
	389	const struct wm8728_setup_data *setup)
	390	{
	391	struct i2c_board_info info;
	392	struct i2c_adapter *adapter;
	393	struct i2c_client *client;
	394	int ret;
	395
	396	ret = i2c_add_driver(&wm8728_i2c_driver);
	397	if (ret != 0) {
	398	dev_err(&pdev->dev, "can't add i2c driver\n");
	399	return ret;
	400	}
	401
	402	memset(&info, 0, sizeof(struct i2c_board_info));
	403	info.addr = setup->i2c_address;
	404	strlcpy(info.type, "wm8728", I2C_NAME_SIZE);
	405
	406	adapter = i2c_get_adapter(setup->i2c_bus);
	407	if (!adapter) {
	408	dev_err(&pdev->dev, "can't get i2c adapter %d\n",
	409	setup->i2c_bus);
	410	goto err_driver;
	411	}
	412
	413	client = i2c_new_device(adapter, &info);
	414	i2c_put_adapter(adapter);
	415	if (!client) {
	416	dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
417	(unsigned int)info.addr);
418	goto err_driver;
419	}
420
421	return 0;
422
423	err_driver:
424	i2c_del_driver(&wm8728_i2c_driver);
425	return -ENODEV;
426	}
427	#endif
428
429	#if defined(CONFIG_SPI_MASTER)
430	static int __devinit wm8728_spi_probe(struct spi_device *spi)
431	{
432	struct snd_soc_device *socdev = wm8728_socdev;
6627a653	433	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	434	int ret;
	435
	436	codec->control_data = spi;
	437
	438	ret = wm8728_init(socdev);
	439	if (ret < 0)
	440	dev_err(&spi->dev, "failed to initialise WM8728\n");
	441
	442	return ret;
	443	}
	444
	445	static int __devexit wm8728_spi_remove(struct spi_device *spi)
	446	{
	447	return 0;
	448	}
	449
	450	static struct spi_driver wm8728_spi_driver = {
	451	.driver = {
	452	.name = "wm8728",
	453	.bus = &spi_bus_type,
	454	.owner = THIS_MODULE,
	455	},
	456	.probe = wm8728_spi_probe,
	457	.remove = __devexit_p(wm8728_spi_remove),
	458	};
	459
	460	static int wm8728_spi_write(struct spi_device spi, const char data, int len)
	461	{
	462	struct spi_transfer t;
	463	struct spi_message m;
	464	u8 msg[2];
	465
	466	if (len <= 0)
	467	return 0;
	468
	469	msg[0] = data[0];
	470	msg[1] = data[1];
	471
	472	spi_message_init(&m);
	473	memset(&t, 0, (sizeof t));
	474
	475	t.tx_buf = &msg[0];
	476	t.len = len;
	477
	478	spi_message_add_tail(&t, &m);
	479	spi_sync(spi, &m);
	480
	481	return len;
	482	}
	483	#endif /* CONFIG_SPI_MASTER */
	484
	485	static int wm8728_probe(struct platform_device *pdev)
	486	{
	487	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	488	struct wm8728_setup_data *setup;
	489	struct snd_soc_codec *codec;
	490	int ret = 0;
	491
	492	setup = socdev->codec_data;
	493	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	494	if (codec == NULL)
	495	return -ENOMEM;
	496
6627a653	497	socdev->card->codec = codec;
71cfc902 MB	498	mutex_init(&codec->mutex);
	499	INIT_LIST_HEAD(&codec->dapm_widgets);
	500	INIT_LIST_HEAD(&codec->dapm_paths);
	501
	502	wm8728_socdev = socdev;
	503	ret = -ENODEV;
	504
	505	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	506	if (setup->i2c_address) {
	507	codec->hw_write = (hw_write_t)i2c_master_send;
	508	ret = wm8728_add_i2c_device(pdev, setup);
	509	}
	510	#endif
	511	#if defined(CONFIG_SPI_MASTER)
	512	if (setup->spi) {
	513	codec->hw_write = (hw_write_t)wm8728_spi_write;
	514	ret = spi_register_driver(&wm8728_spi_driver);
	515	if (ret != 0)
	516	printk(KERN_ERR "can't add spi driver");
	517	}
	518	#endif
	519
	520	if (ret != 0)
	521	kfree(codec);
	522
	523	return ret;
	524	}
	525
	526	/* power down chip */
	527	static int wm8728_remove(struct platform_device *pdev)
	528	{
	529	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	530	struct snd_soc_codec *codec = socdev->card->codec;
71cfc902 MB	531
	532	if (codec->control_data)
	533	wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
	534
	535	snd_soc_free_pcms(socdev);
	536	snd_soc_dapm_free(socdev);
	537	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	538	i2c_unregister_device(codec->control_data);
	539	i2c_del_driver(&wm8728_i2c_driver);
	540	#endif
	541	#if defined(CONFIG_SPI_MASTER)
	542	spi_unregister_driver(&wm8728_spi_driver);
	543	#endif
	544	kfree(codec);
	545
	546	return 0;
	547	}
	548
	549	struct snd_soc_codec_device soc_codec_dev_wm8728 = {
	550	.probe = wm8728_probe,
	551	.remove = wm8728_remove,
	552	.suspend = wm8728_suspend,
	553	.resume = wm8728_resume,
	554	};
	555	EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728);
	556
c9b3a40f	557	static int __init wm8728_modinit(void)
64089b84 MB	558	{
	559	return snd_soc_register_dai(&wm8728_dai);
	560	}
	561	module_init(wm8728_modinit);
	562
	563	static void __exit wm8728_exit(void)
	564	{
	565	snd_soc_unregister_dai(&wm8728_dai);
	566	}
	567	module_exit(wm8728_exit);
	568
71cfc902 MB	569	MODULE_DESCRIPTION("ASoC WM8728 driver");
	570	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	571	MODULE_LICENSE("GPL");