[net-next-2.6.git] / sound / soc / codecs / wm8776.c

/*
 * wm8776.c  --  WM8776 ALSA SoC Audio driver
 *
 * Copyright 2009 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.
 *
 * TODO: Input ALC/limiter support
 */

#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 "wm8776.h"

/* codec private data */
struct wm8776_priv {
	enum snd_soc_control_type control_type;
	u16 reg_cache[WM8776_CACHEREGNUM];
	int sysclk[2];
};

static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
	0x79, 0x79, 0x79, 0xff, 0xff,  /* 4 */
	0xff, 0x00, 0x90, 0x00, 0x00,  /* 9 */
	0x22, 0x22, 0x22, 0x08, 0xcf,  /* 14 */
	0xcf, 0x7b, 0x00, 0x32, 0x00,  /* 19 */
	0xa6, 0x01, 0x01
};

static int wm8776_reset(struct snd_soc_codec *codec)
{
	return snd_soc_write(codec, WM8776_RESET, 0);
}

static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);

static const struct snd_kcontrol_new wm8776_snd_controls[] = {
SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
		 0, 127, 0, hp_tlv),
SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
		 0, 255, 0, dac_tlv),
SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),

SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),

SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
		 0, 255, 0, adc_tlv),
SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
};

static const struct snd_kcontrol_new inmix_controls[] = {
SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
};

static const struct snd_kcontrol_new outmix_controls[] = {
SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
};

static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("AUX"),

SND_SOC_DAPM_INPUT("AIN1"),
SND_SOC_DAPM_INPUT("AIN2"),
SND_SOC_DAPM_INPUT("AIN3"),
SND_SOC_DAPM_INPUT("AIN4"),
SND_SOC_DAPM_INPUT("AIN5"),

SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
		   inmix_controls, ARRAY_SIZE(inmix_controls)),

SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),

SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
		   outmix_controls, ARRAY_SIZE(outmix_controls)),

SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),

SND_SOC_DAPM_OUTPUT("VOUT"),

SND_SOC_DAPM_OUTPUT("HPOUTL"),
SND_SOC_DAPM_OUTPUT("HPOUTR"),
};

static const struct snd_soc_dapm_route routes[] = {
	{ "Input Mixer", "AIN1 Switch", "AIN1" },
	{ "Input Mixer", "AIN2 Switch", "AIN2" },
	{ "Input Mixer", "AIN3 Switch", "AIN3" },
	{ "Input Mixer", "AIN4 Switch", "AIN4" },
	{ "Input Mixer", "AIN5 Switch", "AIN5" },

	{ "ADC", NULL, "Input Mixer" },

	{ "Output Mixer", "DAC Switch", "DAC" },
	{ "Output Mixer", "AUX Switch", "AUX" },
	{ "Output Mixer", "Bypass Switch", "Input Mixer" },

	{ "VOUT", NULL, "Output Mixer" },

	{ "Headphone PGA", NULL, "Output Mixer" },

	{ "HPOUTL", NULL, "Headphone PGA" },
	{ "HPOUTR", NULL, "Headphone PGA" },
};

static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct snd_soc_codec *codec = dai->codec;
	int reg, iface, master;

	switch (dai->driver->id) {
	case WM8776_DAI_DAC:
		reg = WM8776_DACIFCTRL;
		master = 0x80;
		break;
	case WM8776_DAI_ADC:
		reg = WM8776_ADCIFCTRL;
		master = 0x100;
		break;
	default:
		return -EINVAL;
	}

	iface = 0;

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		master = 0;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		iface |= 0x0002;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		iface |= 0x0001;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_IB_IF:
		iface |= 0x00c;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		iface |= 0x008;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		iface |= 0x004;
		break;
	default:
		return -EINVAL;
	}

	/* Finally, write out the values */
	snd_soc_update_bits(codec, reg, 0xf, iface);
	snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);

	return 0;
}

static int mclk_ratios[] = {
	128,
	192,
	256,
	384,
	512,
	768,
};

static int wm8776_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
	int iface_reg, iface;
	int ratio_shift, master;
	int i;

	iface = 0;

	switch (dai->driver->id) {
	case WM8776_DAI_DAC:
		iface_reg = WM8776_DACIFCTRL;
		master = 0x80;
		ratio_shift = 4;
		break;
	case WM8776_DAI_ADC:
		iface_reg = WM8776_ADCIFCTRL;
		master = 0x100;
		ratio_shift = 0;
		break;
	default:
		return -EINVAL;
	}


	/* Set word length */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		iface |= 0x10;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		iface |= 0x20;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		iface |= 0x30;
		break;
	}

	/* Only need to set MCLK/LRCLK ratio if we're master */
	if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
		for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
			if (wm8776->sysclk[dai->driver->id] / params_rate(params)
			    == mclk_ratios[i])
				break;
		}

		if (i == ARRAY_SIZE(mclk_ratios)) {
			dev_err(codec->dev,
				"Unable to configure MCLK ratio %d/%d\n",
				wm8776->sysclk[dai->driver->id], params_rate(params));
			return -EINVAL;
		}

		dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);

		snd_soc_update_bits(codec, WM8776_MSTRCTRL,
				    0x7 << ratio_shift, i << ratio_shift);
	} else {
		dev_dbg(codec->dev, "DAI in slave mode\n");
	}

	snd_soc_update_bits(codec, iface_reg, 0x30, iface);

	return 0;
}

static int wm8776_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;

	return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
}

static int wm8776_set_sysclk(struct snd_soc_dai *dai,
			     int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = dai->codec;
	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);

	BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk));

	wm8776->sysclk[dai->driver->id] = freq;

	return 0;
}

static int wm8776_set_bias_level(struct snd_soc_codec *codec,
				 enum snd_soc_bias_level level)
{
	switch (level) {
	case SND_SOC_BIAS_ON:
		break;
	case SND_SOC_BIAS_PREPARE:
		break;
	case SND_SOC_BIAS_STANDBY:
		if (codec->bias_level == SND_SOC_BIAS_OFF) {
			/* Disable the global powerdown; DAPM does the rest */
			snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
		}

		break;
	case SND_SOC_BIAS_OFF:
		snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
		break;
	}

	codec->bias_level = level;
	return 0;
}

#define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
		      SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
		      SNDRV_PCM_RATE_96000)


#define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_soc_dai_ops wm8776_dac_ops = {
	.digital_mute	= wm8776_mute,
	.hw_params      = wm8776_hw_params,
	.set_fmt        = wm8776_set_fmt,
	.set_sysclk     = wm8776_set_sysclk,
};

static struct snd_soc_dai_ops wm8776_adc_ops = {
	.hw_params      = wm8776_hw_params,
	.set_fmt        = wm8776_set_fmt,
	.set_sysclk     = wm8776_set_sysclk,
};

static struct snd_soc_dai_driver wm8776_dai[] = {
	{
		.name = "wm8776-hifi-playback",
		.id	= WM8776_DAI_DAC,
		.playback = {
			.stream_name = "Playback",
			.channels_min = 2,
			.channels_max = 2,
			.rates = WM8776_RATES,
			.formats = WM8776_FORMATS,
		},
		.ops = &wm8776_dac_ops,
	},
	{
		.name = "wm8776-hifi-capture",
		.id	= WM8776_DAI_ADC,
		.capture = {
			.stream_name = "Capture",
			.channels_min = 2,
			.channels_max = 2,
			.rates = WM8776_RATES,
			.formats = WM8776_FORMATS,
		},
		.ops = &wm8776_adc_ops,
	},
};

#ifdef CONFIG_PM
static int wm8776_suspend(struct snd_soc_codec *codec, pm_message_t state)
{
	wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);

	return 0;
}

static int wm8776_resume(struct snd_soc_codec *codec)
{
	int i;
	u8 data[2];
	u16 *cache = codec->reg_cache;

	/* Sync reg_cache with the hardware */
	for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
		if (cache[i] == wm8776_reg[i])
			continue;
		data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
		data[1] = cache[i] & 0x00ff;
		codec->hw_write(codec->control_data, data, 2);
	}

	wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	return 0;
}
#else
#define wm8776_suspend NULL
#define wm8776_resume NULL
#endif

static int wm8776_probe(struct snd_soc_codec *codec)
{
	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		return ret;
	}

	ret = wm8776_reset(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
		return ret;
	}

	wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	/* Latch the update bits; right channel only since we always
	 * update both. */
	snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
	snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);

	snd_soc_add_controls(codec, wm8776_snd_controls,
			     ARRAY_SIZE(wm8776_snd_controls));
	snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets,
				  ARRAY_SIZE(wm8776_dapm_widgets));
	snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes));

	return ret;
}

/* power down chip */
static int wm8776_remove(struct snd_soc_codec *codec)
{
	wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
	.probe = 	wm8776_probe,
	.remove = 	wm8776_remove,
	.suspend = 	wm8776_suspend,
	.resume =	wm8776_resume,
	.set_bias_level = wm8776_set_bias_level,
	.reg_cache_size = ARRAY_SIZE(wm8776_reg),
	.reg_word_size = sizeof(u16),
	.reg_cache_default = wm8776_reg,
};

#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8776_spi_probe(struct spi_device *spi)
{
	struct wm8776_priv *wm8776;
	int ret;

	wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
	if (wm8776 == NULL)
		return -ENOMEM;

	wm8776->control_type = SND_SOC_SPI;
	spi_set_drvdata(spi, wm8776);

	ret = snd_soc_register_codec(&spi->dev,
			&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
	if (ret < 0)
		kfree(wm8776);
	return ret;
}

static int __devexit wm8776_spi_remove(struct spi_device *spi)
{
	snd_soc_unregister_codec(&spi->dev);
	kfree(spi_get_drvdata(spi));
	return 0;
}

static struct spi_driver wm8776_spi_driver = {
	.driver = {
		.name	= "wm8776-codec",
		.owner	= THIS_MODULE,
	},
	.probe		= wm8776_spi_probe,
	.remove		= __devexit_p(wm8776_spi_remove),
};
#endif /* CONFIG_SPI_MASTER */

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
				      const struct i2c_device_id *id)
{
	struct wm8776_priv *wm8776;
	int ret;

	wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
	if (wm8776 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, wm8776);
	wm8776->control_type = SND_SOC_I2C;

	ret =  snd_soc_register_codec(&i2c->dev,
			&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
	if (ret < 0)
		kfree(wm8776);
	return ret;
}

static __devexit int wm8776_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 wm8776_i2c_id[] = {
	{ "wm8776", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);

static struct i2c_driver wm8776_i2c_driver = {
	.driver = {
		.name = "wm8776-codec",
		.owner = THIS_MODULE,
	},
	.probe =    wm8776_i2c_probe,
	.remove =   __devexit_p(wm8776_i2c_remove),
	.id_table = wm8776_i2c_id,
};
#endif

static int __init wm8776_modinit(void)
{
	int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	ret = i2c_add_driver(&wm8776_i2c_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
		       ret);
	}
#endif
#if defined(CONFIG_SPI_MASTER)
	ret = spi_register_driver(&wm8776_spi_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
		       ret);
	}
#endif
	return ret;
}
module_init(wm8776_modinit);

static void __exit wm8776_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&wm8776_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&wm8776_spi_driver);
#endif
}
module_exit(wm8776_exit);

MODULE_DESCRIPTION("ASoC WM8776 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
924914ee MB	1	/*
	2	* wm8776.c -- WM8776 ALSA SoC Audio driver
	3	*
	4	* Copyright 2009 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	* TODO: Input ALC/limiter support
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/moduleparam.h>
	17	#include <linux/init.h>
	18	#include <linux/delay.h>
	19	#include <linux/pm.h>
	20	#include <linux/i2c.h>
	21	#include <linux/platform_device.h>
	22	#include <linux/spi/spi.h>
5a0e3ad6	23	#include <linux/slab.h>
924914ee MB	24	#include <sound/core.h>
	25	#include <sound/pcm.h>
	26	#include <sound/pcm_params.h>
	27	#include <sound/soc.h>
	28	#include <sound/soc-dapm.h>
	29	#include <sound/initval.h>
	30	#include <sound/tlv.h>
	31
	32	#include "wm8776.h"
	33
924914ee MB	34	/* codec private data */
924914ee MB	35	struct wm8776_priv {
f0fba2ad	36	enum snd_soc_control_type control_type;
924914ee MB	37	u16 reg_cache[WM8776_CACHEREGNUM];
	38	int sysclk[2];
	39	};
	40
924914ee MB	41	static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
	42	0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */
	43	0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */
	44	0x22, 0x22, 0x22, 0x08, 0xcf, /* 14 */
	45	0xcf, 0x7b, 0x00, 0x32, 0x00, /* 19 */
	46	0xa6, 0x01, 0x01
	47	};
	48
924914ee MB	49	static int wm8776_reset(struct snd_soc_codec *codec)
924914ee MB	50	{
35b1207b	51	return snd_soc_write(codec, WM8776_RESET, 0);
924914ee MB	52	}
	53
	54	static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
	55	static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
	56	static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
	57
	58	static const struct snd_kcontrol_new wm8776_snd_controls[] = {
	59	SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
	60	0, 127, 0, hp_tlv),
	61	SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
	62	0, 255, 0, dac_tlv),
	63	SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
	64
	65	SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
	66
	67	SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
	68	0, 255, 0, adc_tlv),
	69	SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
	70	SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
	71	SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
	72	};
	73
	74	static const struct snd_kcontrol_new inmix_controls[] = {
	75	SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
	76	SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
	77	SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
	78	SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
	79	SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
	80	};
	81
	82	static const struct snd_kcontrol_new outmix_controls[] = {
	83	SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
	84	SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
	85	SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
	86	};
	87
	88	static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
	89	SND_SOC_DAPM_INPUT("AUX"),
924914ee MB	90
	91	SND_SOC_DAPM_INPUT("AIN1"),
	92	SND_SOC_DAPM_INPUT("AIN2"),
	93	SND_SOC_DAPM_INPUT("AIN3"),
	94	SND_SOC_DAPM_INPUT("AIN4"),
	95	SND_SOC_DAPM_INPUT("AIN5"),
	96
	97	SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
	98	inmix_controls, ARRAY_SIZE(inmix_controls)),
	99
	100	SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
	101	SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
	102
	103	SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
	104	outmix_controls, ARRAY_SIZE(outmix_controls)),
	105
	106	SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
	107
	108	SND_SOC_DAPM_OUTPUT("VOUT"),
	109
	110	SND_SOC_DAPM_OUTPUT("HPOUTL"),
	111	SND_SOC_DAPM_OUTPUT("HPOUTR"),
	112	};
	113
	114	static const struct snd_soc_dapm_route routes[] = {
	115	{ "Input Mixer", "AIN1 Switch", "AIN1" },
	116	{ "Input Mixer", "AIN2 Switch", "AIN2" },
	117	{ "Input Mixer", "AIN3 Switch", "AIN3" },
	118	{ "Input Mixer", "AIN4 Switch", "AIN4" },
	119	{ "Input Mixer", "AIN5 Switch", "AIN5" },
	120
	121	{ "ADC", NULL, "Input Mixer" },
	122
	123	{ "Output Mixer", "DAC Switch", "DAC" },
	124	{ "Output Mixer", "AUX Switch", "AUX" },
	125	{ "Output Mixer", "Bypass Switch", "Input Mixer" },
	126
	127	{ "VOUT", NULL, "Output Mixer" },
	128
	129	{ "Headphone PGA", NULL, "Output Mixer" },
	130
	131	{ "HPOUTL", NULL, "Headphone PGA" },
	132	{ "HPOUTR", NULL, "Headphone PGA" },
	133	};
	134
	135	static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
	136	{
	137	struct snd_soc_codec *codec = dai->codec;
	138	int reg, iface, master;
	139
f0fba2ad	140	switch (dai->driver->id) {
924914ee MB	141	case WM8776_DAI_DAC:
	142	reg = WM8776_DACIFCTRL;
	143	master = 0x80;
	144	break;
	145	case WM8776_DAI_ADC:
	146	reg = WM8776_ADCIFCTRL;
	147	master = 0x100;
	148	break;
	149	default:
	150	return -EINVAL;
	151	}
	152
	153	iface = 0;
	154
	155	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	156	case SND_SOC_DAIFMT_CBM_CFM:
	157	break;
	158	case SND_SOC_DAIFMT_CBS_CFS:
	159	master = 0;
	160	break;
	161	default:
	162	return -EINVAL;
	163	}
	164
	165	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	166	case SND_SOC_DAIFMT_I2S:
	167	iface \|= 0x0002;
	168	break;
	169	case SND_SOC_DAIFMT_RIGHT_J:
	170	break;
	171	case SND_SOC_DAIFMT_LEFT_J:
	172	iface \|= 0x0001;
	173	break;
924914ee MB	174	default:
	175	return -EINVAL;
	176	}
	177
	178	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	179	case SND_SOC_DAIFMT_NB_NF:
	180	break;
	181	case SND_SOC_DAIFMT_IB_IF:
	182	iface \|= 0x00c;
	183	break;
	184	case SND_SOC_DAIFMT_IB_NF:
	185	iface \|= 0x008;
	186	break;
	187	case SND_SOC_DAIFMT_NB_IF:
	188	iface \|= 0x004;
	189	break;
	190	default:
	191	return -EINVAL;
	192	}
	193
	194	/* Finally, write out the values */
	195	snd_soc_update_bits(codec, reg, 0xf, iface);
	196	snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
	197
	198	return 0;
	199	}
	200
	201	static int mclk_ratios[] = {
	202	128,
	203	192,
	204	256,
	205	384,
	206	512,
	207	768,
	208	};
	209
	210	static int wm8776_hw_params(struct snd_pcm_substream *substream,
	211	struct snd_pcm_hw_params *params,
	212	struct snd_soc_dai *dai)
	213	{
	214	struct snd_soc_codec *codec = dai->codec;
b2c812e2	215	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
924914ee MB	216	int iface_reg, iface;
	217	int ratio_shift, master;
	218	int i;
	219
	220	iface = 0;
	221
f0fba2ad	222	switch (dai->driver->id) {
924914ee MB	223	case WM8776_DAI_DAC:
	224	iface_reg = WM8776_DACIFCTRL;
	225	master = 0x80;
	226	ratio_shift = 4;
	227	break;
	228	case WM8776_DAI_ADC:
	229	iface_reg = WM8776_ADCIFCTRL;
	230	master = 0x100;
	231	ratio_shift = 0;
	232	break;
	233	default:
	234	return -EINVAL;
	235	}
	236
	237
	238	/* Set word length */
	239	switch (params_format(params)) {
	240	case SNDRV_PCM_FORMAT_S16_LE:
	241	break;
	242	case SNDRV_PCM_FORMAT_S20_3LE:
	243	iface \|= 0x10;
	244	break;
	245	case SNDRV_PCM_FORMAT_S24_LE:
	246	iface \|= 0x20;
	247	break;
	248	case SNDRV_PCM_FORMAT_S32_LE:
	249	iface \|= 0x30;
	250	break;
	251	}
	252
	253	/* Only need to set MCLK/LRCLK ratio if we're master */
	254	if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
	255	for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
f0fba2ad	256	if (wm8776->sysclk[dai->driver->id] / params_rate(params)
924914ee MB	257	== mclk_ratios[i])
	258	break;
	259	}
	260
	261	if (i == ARRAY_SIZE(mclk_ratios)) {
	262	dev_err(codec->dev,
	263	"Unable to configure MCLK ratio %d/%d\n",
f0fba2ad	264	wm8776->sysclk[dai->driver->id], params_rate(params));
924914ee MB	265	return -EINVAL;
	266	}
	267
	268	dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
	269
	270	snd_soc_update_bits(codec, WM8776_MSTRCTRL,
	271	0x7 << ratio_shift, i << ratio_shift);
	272	} else {
	273	dev_dbg(codec->dev, "DAI in slave mode\n");
	274	}
	275
	276	snd_soc_update_bits(codec, iface_reg, 0x30, iface);
	277
	278	return 0;
	279	}
	280
	281	static int wm8776_mute(struct snd_soc_dai *dai, int mute)
	282	{
	283	struct snd_soc_codec *codec = dai->codec;
	284
	285	return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
	286	}
	287
	288	static int wm8776_set_sysclk(struct snd_soc_dai *dai,
	289	int clk_id, unsigned int freq, int dir)
	290	{
	291	struct snd_soc_codec *codec = dai->codec;
b2c812e2	292	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
924914ee	293
f0fba2ad	294	BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk));
924914ee	295
f0fba2ad	296	wm8776->sysclk[dai->driver->id] = freq;
924914ee MB	297
	298	return 0;
	299	}
	300
	301	static int wm8776_set_bias_level(struct snd_soc_codec *codec,
	302	enum snd_soc_bias_level level)
	303	{
	304	switch (level) {
	305	case SND_SOC_BIAS_ON:
	306	break;
	307	case SND_SOC_BIAS_PREPARE:
	308	break;
	309	case SND_SOC_BIAS_STANDBY:
	310	if (codec->bias_level == SND_SOC_BIAS_OFF) {
	311	/* Disable the global powerdown; DAPM does the rest */
	312	snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
	313	}
	314
	315	break;
	316	case SND_SOC_BIAS_OFF:
	317	snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
	318	break;
	319	}
	320
	321	codec->bias_level = level;
	322	return 0;
	323	}
	324
	325	#define WM8776_RATES (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \|\
	326	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \|\
	327	SNDRV_PCM_RATE_96000)
	328
	329
	330	#define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	331	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
	332
	333	static struct snd_soc_dai_ops wm8776_dac_ops = {
	334	.digital_mute = wm8776_mute,
	335	.hw_params = wm8776_hw_params,
	336	.set_fmt = wm8776_set_fmt,
	337	.set_sysclk = wm8776_set_sysclk,
	338	};
	339
	340	static struct snd_soc_dai_ops wm8776_adc_ops = {
	341	.hw_params = wm8776_hw_params,
	342	.set_fmt = wm8776_set_fmt,
	343	.set_sysclk = wm8776_set_sysclk,
	344	};
	345
f0fba2ad	346	static struct snd_soc_dai_driver wm8776_dai[] = {
924914ee	347	{
f0fba2ad LG	348	.name = "wm8776-hifi-playback",
f0fba2ad LG	349	.id = WM8776_DAI_DAC,
924914ee MB	350	.playback = {
	351	.stream_name = "Playback",
	352	.channels_min = 2,
	353	.channels_max = 2,
	354	.rates = WM8776_RATES,
	355	.formats = WM8776_FORMATS,
	356	},
	357	.ops = &wm8776_dac_ops,
	358	},
	359	{
f0fba2ad LG	360	.name = "wm8776-hifi-capture",
f0fba2ad LG	361	.id = WM8776_DAI_ADC,
924914ee MB	362	.capture = {
	363	.stream_name = "Capture",
	364	.channels_min = 2,
	365	.channels_max = 2,
	366	.rates = WM8776_RATES,
	367	.formats = WM8776_FORMATS,
	368	},
	369	.ops = &wm8776_adc_ops,
	370	},
	371	};
924914ee MB	372
924914ee MB	373	#ifdef CONFIG_PM
f0fba2ad	374	static int wm8776_suspend(struct snd_soc_codec *codec, pm_message_t state)
924914ee	375	{
924914ee MB	376	wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
	377
	378	return 0;
	379	}
	380
f0fba2ad	381	static int wm8776_resume(struct snd_soc_codec *codec)
924914ee	382	{
924914ee MB	383	int i;
	384	u8 data[2];
	385	u16 *cache = codec->reg_cache;
	386
	387	/* Sync reg_cache with the hardware */
	388	for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
e0fb28e0 MB	389	if (cache[i] == wm8776_reg[i])
e0fb28e0 MB	390	continue;
924914ee MB	391	data[0] = (i << 1) \| ((cache[i] >> 8) & 0x0001);
	392	data[1] = cache[i] & 0x00ff;
	393	codec->hw_write(codec->control_data, data, 2);
	394	}
	395
	396	wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	397
	398	return 0;
	399	}
	400	#else
	401	#define wm8776_suspend NULL
	402	#define wm8776_resume NULL
	403	#endif
	404
f0fba2ad	405	static int wm8776_probe(struct snd_soc_codec *codec)
924914ee	406	{
f0fba2ad	407	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
924914ee MB	408	int ret = 0;
924914ee MB	409
f0fba2ad LG	410	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type);
	411	if (ret < 0) {
	412	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
	413	return ret;
924914ee MB	414	}
924914ee MB	415
f0fba2ad	416	ret = wm8776_reset(codec);
924914ee	417	if (ret < 0) {
f0fba2ad LG	418	dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
f0fba2ad LG	419	return ret;
924914ee MB	420	}
924914ee MB	421
f0fba2ad LG	422	wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	423
	424	/* Latch the update bits; right channel only since we always
	425	* update both. */
	426	snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
	427	snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
	428
924914ee MB	429	snd_soc_add_controls(codec, wm8776_snd_controls,
	430	ARRAY_SIZE(wm8776_snd_controls));
	431	snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets,
	432	ARRAY_SIZE(wm8776_dapm_widgets));
	433	snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes));
	434
924914ee	435	return ret;
924914ee MB	436	}
	437
	438	/* power down chip */
f0fba2ad	439	static int wm8776_remove(struct snd_soc_codec *codec)
924914ee	440	{
f0fba2ad	441	wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
924914ee MB	442	return 0;
	443	}
	444
f0fba2ad	445	static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
924914ee MB	446	.probe = wm8776_probe,
	447	.remove = wm8776_remove,
	448	.suspend = wm8776_suspend,
	449	.resume = wm8776_resume,
f0fba2ad	450	.set_bias_level = wm8776_set_bias_level,
e5eec34c	451	.reg_cache_size = ARRAY_SIZE(wm8776_reg),
f0fba2ad LG	452	.reg_word_size = sizeof(u16),
f0fba2ad LG	453	.reg_cache_default = wm8776_reg,
924914ee	454	};
924914ee MB	455
924914ee MB	456	#if defined(CONFIG_SPI_MASTER)
924914ee MB	457	static int __devinit wm8776_spi_probe(struct spi_device *spi)
924914ee MB	458	{
924914ee	459	struct wm8776_priv *wm8776;
f0fba2ad	460	int ret;
924914ee MB	461
	462	wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
	463	if (wm8776 == NULL)
	464	return -ENOMEM;
	465
f0fba2ad LG	466	wm8776->control_type = SND_SOC_SPI;
f0fba2ad LG	467	spi_set_drvdata(spi, wm8776);
924914ee	468
f0fba2ad LG	469	ret = snd_soc_register_codec(&spi->dev,
	470	&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
	471	if (ret < 0)
	472	kfree(wm8776);
	473	return ret;
924914ee MB	474	}
	475
	476	static int __devexit wm8776_spi_remove(struct spi_device *spi)
	477	{
f0fba2ad LG	478	snd_soc_unregister_codec(&spi->dev);
f0fba2ad LG	479	kfree(spi_get_drvdata(spi));
924914ee MB	480	return 0;
	481	}
	482
924914ee MB	483	static struct spi_driver wm8776_spi_driver = {
924914ee MB	484	.driver = {
f0fba2ad	485	.name = "wm8776-codec",
924914ee MB	486	.owner = THIS_MODULE,
	487	},
	488	.probe = wm8776_spi_probe,
924914ee MB	489	.remove = __devexit_p(wm8776_spi_remove),
	490	};
	491	#endif /* CONFIG_SPI_MASTER */
	492
	493	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	494	static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
	495	const struct i2c_device_id *id)
	496	{
	497	struct wm8776_priv *wm8776;
f0fba2ad	498	int ret;
924914ee MB	499
	500	wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
	501	if (wm8776 == NULL)
	502	return -ENOMEM;
	503
924914ee	504	i2c_set_clientdata(i2c, wm8776);
f0fba2ad	505	wm8776->control_type = SND_SOC_I2C;
924914ee	506
f0fba2ad LG	507	ret = snd_soc_register_codec(&i2c->dev,
	508	&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
	509	if (ret < 0)
	510	kfree(wm8776);
	511	return ret;
924914ee MB	512	}
	513
	514	static __devexit int wm8776_i2c_remove(struct i2c_client *client)
	515	{
f0fba2ad LG	516	snd_soc_unregister_codec(&client->dev);
f0fba2ad LG	517	kfree(i2c_get_clientdata(client));
924914ee MB	518	return 0;
	519	}
	520
924914ee MB	521	static const struct i2c_device_id wm8776_i2c_id[] = {
	522	{ "wm8776", 0 },
	523	{ }
	524	};
	525	MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
	526
	527	static struct i2c_driver wm8776_i2c_driver = {
	528	.driver = {
f0fba2ad	529	.name = "wm8776-codec",
924914ee MB	530	.owner = THIS_MODULE,
	531	},
	532	.probe = wm8776_i2c_probe,
	533	.remove = __devexit_p(wm8776_i2c_remove),
924914ee MB	534	.id_table = wm8776_i2c_id,
	535	};
	536	#endif
	537
	538	static int __init wm8776_modinit(void)
	539	{
f0fba2ad	540	int ret = 0;
924914ee MB	541	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	542	ret = i2c_add_driver(&wm8776_i2c_driver);
	543	if (ret != 0) {
f0fba2ad	544	printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
924914ee MB	545	ret);
	546	}
	547	#endif
	548	#if defined(CONFIG_SPI_MASTER)
	549	ret = spi_register_driver(&wm8776_spi_driver);
	550	if (ret != 0) {
f0fba2ad	551	printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
924914ee MB	552	ret);
	553	}
	554	#endif
f0fba2ad	555	return ret;
924914ee MB	556	}
	557	module_init(wm8776_modinit);
	558
	559	static void __exit wm8776_exit(void)
	560	{
	561	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	562	i2c_del_driver(&wm8776_i2c_driver);
	563	#endif
	564	#if defined(CONFIG_SPI_MASTER)
	565	spi_unregister_driver(&wm8776_spi_driver);
	566	#endif
	567	}
	568	module_exit(wm8776_exit);
	569
	570	MODULE_DESCRIPTION("ASoC WM8776 driver");
	571	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	572	MODULE_LICENSE("GPL");