[mirror_ubuntu-bionic-kernel.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/of_device.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "wm8776.h"

/* codec private data */
struct wm8776_priv {
	enum snd_soc_control_type control_type;
	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;

	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 (snd_pcm_format_width(params_format(params))) {
	case 16:
		iface = 0;
	case 20:
		iface = 0x10;
		break;
	case 24:
		iface = 0x20;
		break;
	case 32:
		iface = 0x30;
		break;
	default:
		dev_err(codec->dev, "Unsupported sample size: %i\n",
			snd_pcm_format_width(params_format(params)));
		return -EINVAL;
	}

	/* 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->dapm.bias_level == SND_SOC_BIAS_OFF) {
			snd_soc_cache_sync(codec);

			/* 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->dapm.bias_level = level;
	return 0;
}

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

static const 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 const 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 = SNDRV_PCM_RATE_CONTINUOUS,
			.rate_min = 32000,
			.rate_max = 192000,
			.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 = SNDRV_PCM_RATE_CONTINUOUS,
			.rate_min = 32000,
			.rate_max = 96000,
			.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)
{
	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);
	struct snd_soc_dapm_context *dapm = &codec->dapm;
	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);

	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,

	.controls = wm8776_snd_controls,
	.num_controls = ARRAY_SIZE(wm8776_snd_controls),
	.dapm_widgets = wm8776_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets),
	.dapm_routes = routes,
	.num_dapm_routes = ARRAY_SIZE(routes),
};

static const struct of_device_id wm8776_of_match[] = {
	{ .compatible = "wlf,wm8776", },
	{ }
};
MODULE_DEVICE_TABLE(of, wm8776_of_match);

#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",
		.owner	= THIS_MODULE,
		.of_match_table = wm8776_of_match,
	},
	.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",
		.owner = THIS_MODULE,
		.of_match_table = wm8776_of_match,
	},
	.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
	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/of_device.h>
	22	#include <linux/platform_device.h>
	23	#include <linux/spi/spi.h>
	24	#include <linux/slab.h>
	25	#include <sound/core.h>
	26	#include <sound/pcm.h>
	27	#include <sound/pcm_params.h>
	28	#include <sound/soc.h>
	29	#include <sound/initval.h>
	30	#include <sound/tlv.h>
	31
	32	#include "wm8776.h"
	33
	34	/* codec private data */
	35	struct wm8776_priv {
	36	enum snd_soc_control_type control_type;
	37	int sysclk[2];
	38	};
	39
	40	static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
	41	0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */
	42	0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */
	43	0x22, 0x22, 0x22, 0x08, 0xcf, /* 14 */
	44	0xcf, 0x7b, 0x00, 0x32, 0x00, /* 19 */
	45	0xa6, 0x01, 0x01
	46	};
	47
	48	static int wm8776_reset(struct snd_soc_codec *codec)
	49	{
	50	return snd_soc_write(codec, WM8776_RESET, 0);
	51	}
	52
	53	static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
	54	static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
	55	static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
	56
	57	static const struct snd_kcontrol_new wm8776_snd_controls[] = {
	58	SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
	59	0, 127, 0, hp_tlv),
	60	SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
	61	0, 255, 0, dac_tlv),
	62	SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
	63
	64	SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
	65
	66	SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
	67	0, 255, 0, adc_tlv),
	68	SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
	69	SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
	70	SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
	71	};
	72
	73	static const struct snd_kcontrol_new inmix_controls[] = {
	74	SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
	75	SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
	76	SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
	77	SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
	78	SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
	79	};
	80
	81	static const struct snd_kcontrol_new outmix_controls[] = {
	82	SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
	83	SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
	84	SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
	85	};
	86
	87	static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
	88	SND_SOC_DAPM_INPUT("AUX"),
	89
	90	SND_SOC_DAPM_INPUT("AIN1"),
	91	SND_SOC_DAPM_INPUT("AIN2"),
	92	SND_SOC_DAPM_INPUT("AIN3"),
	93	SND_SOC_DAPM_INPUT("AIN4"),
	94	SND_SOC_DAPM_INPUT("AIN5"),
	95
	96	SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
	97	inmix_controls, ARRAY_SIZE(inmix_controls)),
	98
	99	SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
	100	SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
	101
	102	SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
	103	outmix_controls, ARRAY_SIZE(outmix_controls)),
	104
	105	SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
	106
	107	SND_SOC_DAPM_OUTPUT("VOUT"),
	108
	109	SND_SOC_DAPM_OUTPUT("HPOUTL"),
	110	SND_SOC_DAPM_OUTPUT("HPOUTR"),
	111	};
	112
	113	static const struct snd_soc_dapm_route routes[] = {
	114	{ "Input Mixer", "AIN1 Switch", "AIN1" },
	115	{ "Input Mixer", "AIN2 Switch", "AIN2" },
	116	{ "Input Mixer", "AIN3 Switch", "AIN3" },
	117	{ "Input Mixer", "AIN4 Switch", "AIN4" },
	118	{ "Input Mixer", "AIN5 Switch", "AIN5" },
	119
	120	{ "ADC", NULL, "Input Mixer" },
	121
	122	{ "Output Mixer", "DAC Switch", "DAC" },
	123	{ "Output Mixer", "AUX Switch", "AUX" },
	124	{ "Output Mixer", "Bypass Switch", "Input Mixer" },
	125
	126	{ "VOUT", NULL, "Output Mixer" },
	127
	128	{ "Headphone PGA", NULL, "Output Mixer" },
	129
	130	{ "HPOUTL", NULL, "Headphone PGA" },
	131	{ "HPOUTR", NULL, "Headphone PGA" },
	132	};
	133
	134	static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
	135	{
	136	struct snd_soc_codec *codec = dai->codec;
	137	int reg, iface, master;
	138
	139	switch (dai->driver->id) {
	140	case WM8776_DAI_DAC:
	141	reg = WM8776_DACIFCTRL;
	142	master = 0x80;
	143	break;
	144	case WM8776_DAI_ADC:
	145	reg = WM8776_ADCIFCTRL;
	146	master = 0x100;
	147	break;
	148	default:
	149	return -EINVAL;
	150	}
	151
	152	iface = 0;
	153
	154	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	155	case SND_SOC_DAIFMT_CBM_CFM:
	156	break;
	157	case SND_SOC_DAIFMT_CBS_CFS:
	158	master = 0;
	159	break;
	160	default:
	161	return -EINVAL;
	162	}
	163
	164	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	165	case SND_SOC_DAIFMT_I2S:
	166	iface \|= 0x0002;
	167	break;
	168	case SND_SOC_DAIFMT_RIGHT_J:
	169	break;
	170	case SND_SOC_DAIFMT_LEFT_J:
	171	iface \|= 0x0001;
	172	break;
	173	default:
	174	return -EINVAL;
	175	}
	176
	177	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	178	case SND_SOC_DAIFMT_NB_NF:
	179	break;
	180	case SND_SOC_DAIFMT_IB_IF:
	181	iface \|= 0x00c;
	182	break;
	183	case SND_SOC_DAIFMT_IB_NF:
	184	iface \|= 0x008;
	185	break;
	186	case SND_SOC_DAIFMT_NB_IF:
	187	iface \|= 0x004;
	188	break;
	189	default:
	190	return -EINVAL;
	191	}
	192
	193	/* Finally, write out the values */
	194	snd_soc_update_bits(codec, reg, 0xf, iface);
	195	snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
	196
	197	return 0;
	198	}
	199
	200	static int mclk_ratios[] = {
	201	128,
	202	192,
	203	256,
	204	384,
	205	512,
	206	768,
	207	};
	208
	209	static int wm8776_hw_params(struct snd_pcm_substream *substream,
	210	struct snd_pcm_hw_params *params,
	211	struct snd_soc_dai *dai)
	212	{
	213	struct snd_soc_codec *codec = dai->codec;
	214	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
	215	int iface_reg, iface;
	216	int ratio_shift, master;
	217	int i;
	218
	219	switch (dai->driver->id) {
	220	case WM8776_DAI_DAC:
	221	iface_reg = WM8776_DACIFCTRL;
	222	master = 0x80;
	223	ratio_shift = 4;
	224	break;
	225	case WM8776_DAI_ADC:
	226	iface_reg = WM8776_ADCIFCTRL;
	227	master = 0x100;
	228	ratio_shift = 0;
	229	break;
	230	default:
	231	return -EINVAL;
	232	}
	233
	234	/* Set word length */
	235	switch (snd_pcm_format_width(params_format(params))) {
	236	case 16:
	237	iface = 0;
	238	case 20:
	239	iface = 0x10;
	240	break;
	241	case 24:
	242	iface = 0x20;
	243	break;
	244	case 32:
	245	iface = 0x30;
	246	break;
	247	default:
	248	dev_err(codec->dev, "Unsupported sample size: %i\n",
	249	snd_pcm_format_width(params_format(params)));
	250	return -EINVAL;
	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++) {
	256	if (wm8776->sysclk[dai->driver->id] / params_rate(params)
	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",
	264	wm8776->sysclk[dai->driver->id], params_rate(params));
	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;
	292	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
	293
	294	BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk));
	295
	296	wm8776->sysclk[dai->driver->id] = freq;
	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->dapm.bias_level == SND_SOC_BIAS_OFF) {
	311	snd_soc_cache_sync(codec);
	312
	313	/* Disable the global powerdown; DAPM does the rest */
	314	snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
	315	}
	316
	317	break;
	318	case SND_SOC_BIAS_OFF:
	319	snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
	320	break;
	321	}
	322
	323	codec->dapm.bias_level = level;
	324	return 0;
	325	}
	326
	327	#define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	328	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
	329
	330	static const struct snd_soc_dai_ops wm8776_dac_ops = {
	331	.digital_mute = wm8776_mute,
	332	.hw_params = wm8776_hw_params,
	333	.set_fmt = wm8776_set_fmt,
	334	.set_sysclk = wm8776_set_sysclk,
	335	};
	336
	337	static const struct snd_soc_dai_ops wm8776_adc_ops = {
	338	.hw_params = wm8776_hw_params,
	339	.set_fmt = wm8776_set_fmt,
	340	.set_sysclk = wm8776_set_sysclk,
	341	};
	342
	343	static struct snd_soc_dai_driver wm8776_dai[] = {
	344	{
	345	.name = "wm8776-hifi-playback",
	346	.id = WM8776_DAI_DAC,
	347	.playback = {
	348	.stream_name = "Playback",
	349	.channels_min = 2,
	350	.channels_max = 2,
	351	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	352	.rate_min = 32000,
	353	.rate_max = 192000,
	354	.formats = WM8776_FORMATS,
	355	},
	356	.ops = &wm8776_dac_ops,
	357	},
	358	{
	359	.name = "wm8776-hifi-capture",
	360	.id = WM8776_DAI_ADC,
	361	.capture = {
	362	.stream_name = "Capture",
	363	.channels_min = 2,
	364	.channels_max = 2,
	365	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	366	.rate_min = 32000,
	367	.rate_max = 96000,
	368	.formats = WM8776_FORMATS,
	369	},
	370	.ops = &wm8776_adc_ops,
	371	},
	372	};
	373
	374	#ifdef CONFIG_PM
	375	static int wm8776_suspend(struct snd_soc_codec *codec, pm_message_t state)
	376	{
	377	wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
	378
	379	return 0;
	380	}
	381
	382	static int wm8776_resume(struct snd_soc_codec *codec)
	383	{
	384	wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	385	return 0;
	386	}
	387	#else
	388	#define wm8776_suspend NULL
	389	#define wm8776_resume NULL
	390	#endif
	391
	392	static int wm8776_probe(struct snd_soc_codec *codec)
	393	{
	394	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
	395	struct snd_soc_dapm_context *dapm = &codec->dapm;
	396	int ret = 0;
	397
	398	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type);
	399	if (ret < 0) {
	400	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
	401	return ret;
	402	}
	403
	404	ret = wm8776_reset(codec);
	405	if (ret < 0) {
	406	dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
	407	return ret;
	408	}
	409
	410	wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	411
	412	/* Latch the update bits; right channel only since we always
	413	* update both. */
	414	snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
	415	snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
	416
	417	return ret;
	418	}
	419
	420	/* power down chip */
	421	static int wm8776_remove(struct snd_soc_codec *codec)
	422	{
	423	wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
	424	return 0;
	425	}
	426
	427	static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
	428	.probe = wm8776_probe,
	429	.remove = wm8776_remove,
	430	.suspend = wm8776_suspend,
	431	.resume = wm8776_resume,
	432	.set_bias_level = wm8776_set_bias_level,
	433	.reg_cache_size = ARRAY_SIZE(wm8776_reg),
	434	.reg_word_size = sizeof(u16),
	435	.reg_cache_default = wm8776_reg,
	436
	437	.controls = wm8776_snd_controls,
	438	.num_controls = ARRAY_SIZE(wm8776_snd_controls),
	439	.dapm_widgets = wm8776_dapm_widgets,
	440	.num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets),
	441	.dapm_routes = routes,
	442	.num_dapm_routes = ARRAY_SIZE(routes),
	443	};
	444
	445	static const struct of_device_id wm8776_of_match[] = {
	446	{ .compatible = "wlf,wm8776", },
	447	{ }
	448	};
	449	MODULE_DEVICE_TABLE(of, wm8776_of_match);
	450
	451	#if defined(CONFIG_SPI_MASTER)
	452	static int __devinit wm8776_spi_probe(struct spi_device *spi)
	453	{
	454	struct wm8776_priv *wm8776;
	455	int ret;
	456
	457	wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
	458	if (wm8776 == NULL)
	459	return -ENOMEM;
	460
	461	wm8776->control_type = SND_SOC_SPI;
	462	spi_set_drvdata(spi, wm8776);
	463
	464	ret = snd_soc_register_codec(&spi->dev,
	465	&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
	466	if (ret < 0)
	467	kfree(wm8776);
	468	return ret;
	469	}
	470
	471	static int __devexit wm8776_spi_remove(struct spi_device *spi)
	472	{
	473	snd_soc_unregister_codec(&spi->dev);
	474	kfree(spi_get_drvdata(spi));
	475	return 0;
	476	}
	477
	478	static struct spi_driver wm8776_spi_driver = {
	479	.driver = {
	480	.name = "wm8776",
	481	.owner = THIS_MODULE,
	482	.of_match_table = wm8776_of_match,
	483	},
	484	.probe = wm8776_spi_probe,
	485	.remove = __devexit_p(wm8776_spi_remove),
	486	};
	487	#endif /* CONFIG_SPI_MASTER */
	488
	489	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	490	static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
	491	const struct i2c_device_id *id)
	492	{
	493	struct wm8776_priv *wm8776;
	494	int ret;
	495
	496	wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
	497	if (wm8776 == NULL)
	498	return -ENOMEM;
	499
	500	i2c_set_clientdata(i2c, wm8776);
	501	wm8776->control_type = SND_SOC_I2C;
	502
	503	ret = snd_soc_register_codec(&i2c->dev,
	504	&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
	505	if (ret < 0)
	506	kfree(wm8776);
	507	return ret;
	508	}
	509
	510	static __devexit int wm8776_i2c_remove(struct i2c_client *client)
	511	{
	512	snd_soc_unregister_codec(&client->dev);
	513	kfree(i2c_get_clientdata(client));
	514	return 0;
	515	}
	516
	517	static const struct i2c_device_id wm8776_i2c_id[] = {
	518	{ "wm8776", 0 },
	519	{ }
	520	};
	521	MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
	522
	523	static struct i2c_driver wm8776_i2c_driver = {
	524	.driver = {
	525	.name = "wm8776",
	526	.owner = THIS_MODULE,
	527	.of_match_table = wm8776_of_match,
	528	},
	529	.probe = wm8776_i2c_probe,
	530	.remove = __devexit_p(wm8776_i2c_remove),
	531	.id_table = wm8776_i2c_id,
	532	};
	533	#endif
	534
	535	static int __init wm8776_modinit(void)
	536	{
	537	int ret = 0;
	538	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	539	ret = i2c_add_driver(&wm8776_i2c_driver);
	540	if (ret != 0) {
	541	printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
	542	ret);
	543	}
	544	#endif
	545	#if defined(CONFIG_SPI_MASTER)
	546	ret = spi_register_driver(&wm8776_spi_driver);
	547	if (ret != 0) {
	548	printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
	549	ret);
	550	}
	551	#endif
	552	return ret;
	553	}
	554	module_init(wm8776_modinit);
	555
	556	static void __exit wm8776_exit(void)
	557	{
	558	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	559	i2c_del_driver(&wm8776_i2c_driver);
	560	#endif
	561	#if defined(CONFIG_SPI_MASTER)
	562	spi_unregister_driver(&wm8776_spi_driver);
	563	#endif
	564	}
	565	module_exit(wm8776_exit);
	566
	567	MODULE_DESCRIPTION("ASoC WM8776 driver");
	568	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	569	MODULE_LICENSE("GPL");