[mirror_ubuntu-bionic-kernel.git] / sound / soc / codecs / ad1836.c

/*
 * File:         sound/soc/codecs/ad1836.c
 * Author:       Barry Song <Barry.Song@analog.com>
 *
 * Created:      Aug 04 2009
 * Description:  Driver for AD1836 sound chip
 *
 * Modified:
 *               Copyright 2009 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/soc-dapm.h>
#include <linux/spi/spi.h>
#include "ad1836.h"

/* codec private data */
struct ad1836_priv {
	struct snd_soc_codec codec;
	u16 reg_cache[AD1836_NUM_REGS];
};

static struct snd_soc_codec *ad1836_codec;
struct snd_soc_codec_device soc_codec_dev_ad1836;
static int ad1836_register(struct ad1836_priv *ad1836);
static void ad1836_unregister(struct ad1836_priv *ad1836);

/*
 * AD1836 volume/mute/de-emphasis etc. controls
 */
static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};

static const struct soc_enum ad1836_deemp_enum =
	SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp);

static const struct snd_kcontrol_new ad1836_snd_controls[] = {
	/* DAC volume control */
	SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL,
			AD1836_DAC_R1_VOL, 0, 0x3FF, 0),
	SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL,
			AD1836_DAC_R2_VOL, 0, 0x3FF, 0),
	SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL,
			AD1836_DAC_R3_VOL, 0, 0x3FF, 0),

	/* ADC switch control */
	SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2, AD1836_ADCL1_MUTE,
		AD1836_ADCR1_MUTE, 1, 1),
	SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2, AD1836_ADCL2_MUTE,
		AD1836_ADCR2_MUTE, 1, 1),

	/* DAC switch control */
	SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2, AD1836_DACL1_MUTE,
		AD1836_DACR1_MUTE, 1, 1),
	SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2, AD1836_DACL2_MUTE,
		AD1836_DACR2_MUTE, 1, 1),
	SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2, AD1836_DACL3_MUTE,
		AD1836_DACR3_MUTE, 1, 1),

	/* ADC high-pass filter */
	SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
			AD1836_ADC_HIGHPASS_FILTER, 1, 0),

	/* DAC de-emphasis */
	SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
};

static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
				AD1836_DAC_POWERDOWN, 1),
	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
				AD1836_ADC_POWERDOWN, 1, NULL, 0),
	SND_SOC_DAPM_OUTPUT("DAC1OUT"),
	SND_SOC_DAPM_OUTPUT("DAC2OUT"),
	SND_SOC_DAPM_OUTPUT("DAC3OUT"),
	SND_SOC_DAPM_INPUT("ADC1IN"),
	SND_SOC_DAPM_INPUT("ADC2IN"),
};

static const struct snd_soc_dapm_route audio_paths[] = {
	{ "DAC", NULL, "ADC_PWR" },
	{ "ADC", NULL, "ADC_PWR" },
	{ "DAC1OUT", "DAC1 Switch", "DAC" },
	{ "DAC2OUT", "DAC2 Switch", "DAC" },
	{ "DAC3OUT", "DAC3 Switch", "DAC" },
	{ "ADC", "ADC1 Switch", "ADC1IN" },
	{ "ADC", "ADC2 Switch", "ADC2IN" },
};

/*
 * DAI ops entries
 */

static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	/* at present, we support adc aux mode to interface with
	 * blackfin sport tdm mode
	 */
	case SND_SOC_DAIFMT_DSP_A:
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_IB_IF:
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	/* ALCLK,ABCLK are both output, AD1836 can only be master */
	case SND_SOC_DAIFMT_CBM_CFM:
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int ad1836_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params,
		struct snd_soc_dai *dai)
{
	int word_len = 0;

	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
	struct snd_soc_codec *codec = socdev->card->codec;

	/* bit size */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		word_len = 3;
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		word_len = 1;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
	case SNDRV_PCM_FORMAT_S32_LE:
		word_len = 0;
		break;
	}

	snd_soc_update_bits(codec, AD1836_DAC_CTRL1,
		AD1836_DAC_WORD_LEN_MASK, word_len);

	snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
		AD1836_ADC_WORD_LEN_MASK, word_len);

	return 0;
}

#ifdef CONFIG_PM
static int ad1836_soc_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;

	/* reset clock control mode */
	u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
	adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;

	return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
}

static int ad1836_soc_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;

	/* restore clock control mode */
	u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
	adc_ctrl2 |= AD1836_ADC_AUX;

	return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
}
#else
#define ad1836_soc_suspend NULL
#define ad1836_soc_resume  NULL
#endif

static int __devinit ad1836_spi_probe(struct spi_device *spi)
{
	struct snd_soc_codec *codec;
	struct ad1836_priv *ad1836;

	ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
	if (ad1836 == NULL)
		return -ENOMEM;

	codec = &ad1836->codec;
	codec->control_data = spi;
	codec->dev = &spi->dev;

	dev_set_drvdata(&spi->dev, ad1836);

	return ad1836_register(ad1836);
}

static int __devexit ad1836_spi_remove(struct spi_device *spi)
{
	struct ad1836_priv *ad1836 = dev_get_drvdata(&spi->dev);

	ad1836_unregister(ad1836);
	return 0;
}

static struct spi_driver ad1836_spi_driver = {
	.driver = {
		.name	= "ad1836",
		.owner	= THIS_MODULE,
	},
	.probe		= ad1836_spi_probe,
	.remove		= __devexit_p(ad1836_spi_remove),
};

static struct snd_soc_dai_ops ad1836_dai_ops = {
	.hw_params = ad1836_hw_params,
	.set_fmt = ad1836_set_dai_fmt,
};

/* codec DAI instance */
struct snd_soc_dai ad1836_dai = {
	.name = "AD1836",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 6,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
			SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 2,
		.channels_max = 4,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
			SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
	},
	.ops = &ad1836_dai_ops,
};
EXPORT_SYMBOL_GPL(ad1836_dai);

static int ad1836_register(struct ad1836_priv *ad1836)
{
	int ret;
	struct snd_soc_codec *codec = &ad1836->codec;

	if (ad1836_codec) {
		dev_err(codec->dev, "Another ad1836 is registered\n");
		return -EINVAL;
	}

	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);
	snd_soc_codec_set_drvdata(codec, ad1836);
	codec->reg_cache = ad1836->reg_cache;
	codec->reg_cache_size = AD1836_NUM_REGS;
	codec->name = "AD1836";
	codec->owner = THIS_MODULE;
	codec->dai = &ad1836_dai;
	codec->num_dai = 1;
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	ad1836_dai.dev = codec->dev;
	ad1836_codec = codec;

	ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
	if (ret < 0) {
		dev_err(codec->dev, "failed to set cache I/O: %d\n",
				ret);
		kfree(ad1836);
		return ret;
	}

	/* default setting for ad1836 */
	/* de-emphasis: 48kHz, power-on dac */
	snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
	/* unmute dac channels */
	snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
	/* high-pass filter enable, power-on adc */
	snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
	/* unmute adc channles, adc aux mode */
	snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
	/* left/right diff:PGA/MUX */
	snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
	/* volume */
	snd_soc_write(codec, AD1836_DAC_L1_VOL, 0x3FF);
	snd_soc_write(codec, AD1836_DAC_R1_VOL, 0x3FF);
	snd_soc_write(codec, AD1836_DAC_L2_VOL, 0x3FF);
	snd_soc_write(codec, AD1836_DAC_R2_VOL, 0x3FF);
	snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF);
	snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF);

	ret = snd_soc_register_codec(codec);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to register codec: %d\n", ret);
		kfree(ad1836);
		return ret;
	}

	ret = snd_soc_register_dai(&ad1836_dai);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
		snd_soc_unregister_codec(codec);
		kfree(ad1836);
		return ret;
	}

	return 0;
}

static void ad1836_unregister(struct ad1836_priv *ad1836)
{
	snd_soc_unregister_dai(&ad1836_dai);
	snd_soc_unregister_codec(&ad1836->codec);
	kfree(ad1836);
	ad1836_codec = NULL;
}

static int ad1836_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec;
	int ret = 0;

	if (ad1836_codec == NULL) {
		dev_err(&pdev->dev, "Codec device not registered\n");
		return -ENODEV;
	}

	socdev->card->codec = ad1836_codec;
	codec = ad1836_codec;

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		dev_err(codec->dev, "failed to create pcms: %d\n", ret);
		goto pcm_err;
	}

	snd_soc_add_controls(codec, ad1836_snd_controls,
			     ARRAY_SIZE(ad1836_snd_controls));
	snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets,
				  ARRAY_SIZE(ad1836_dapm_widgets));
	snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));

pcm_err:
	return ret;
}

/* power down chip */
static int ad1836_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);

	return 0;
}

struct snd_soc_codec_device soc_codec_dev_ad1836 = {
	.probe = 	ad1836_probe,
	.remove = 	ad1836_remove,
	.suspend =      ad1836_soc_suspend,
	.resume =       ad1836_soc_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836);

static int __init ad1836_init(void)
{
	int ret;

	ret = spi_register_driver(&ad1836_spi_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n",
				ret);
	}

	return ret;
}
module_init(ad1836_init);

static void __exit ad1836_exit(void)
{
	spi_unregister_driver(&ad1836_spi_driver);
}
module_exit(ad1836_exit);

MODULE_DESCRIPTION("ASoC ad1836 driver");
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
7eaae41e BS	1	/*
	2	* File: sound/soc/codecs/ad1836.c
	3	* Author: Barry Song <Barry.Song@analog.com>
	4	*
	5	* Created: Aug 04 2009
	6	* Description: Driver for AD1836 sound chip
	7	*
	8	* Modified:
	9	* Copyright 2009 Analog Devices Inc.
	10	*
	11	* Bugs: Enter bugs at http://blackfin.uclinux.org/
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or
	16	* (at your option) any later version.
	17	*/
	18
	19	#include <linux/init.h>
	20	#include <linux/module.h>
7eaae41e BS	21	#include <linux/kernel.h>
	22	#include <linux/device.h>
	23	#include <sound/core.h>
	24	#include <sound/pcm.h>
	25	#include <sound/pcm_params.h>
	26	#include <sound/initval.h>
	27	#include <sound/soc.h>
	28	#include <sound/tlv.h>
	29	#include <sound/soc-dapm.h>
	30	#include <linux/spi/spi.h>
	31	#include "ad1836.h"
	32
	33	/* codec private data */
	34	struct ad1836_priv {
	35	struct snd_soc_codec codec;
	36	u16 reg_cache[AD1836_NUM_REGS];
	37	};
	38
	39	static struct snd_soc_codec *ad1836_codec;
	40	struct snd_soc_codec_device soc_codec_dev_ad1836;
	41	static int ad1836_register(struct ad1836_priv *ad1836);
	42	static void ad1836_unregister(struct ad1836_priv *ad1836);
	43
	44	/*
	45	* AD1836 volume/mute/de-emphasis etc. controls
	46	*/
	47	static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};
	48
	49	static const struct soc_enum ad1836_deemp_enum =
	50	SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp);
	51
	52	static const struct snd_kcontrol_new ad1836_snd_controls[] = {
	53	/* DAC volume control */
	54	SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL,
	55	AD1836_DAC_R1_VOL, 0, 0x3FF, 0),
	56	SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL,
	57	AD1836_DAC_R2_VOL, 0, 0x3FF, 0),
	58	SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL,
	59	AD1836_DAC_R3_VOL, 0, 0x3FF, 0),
	60
	61	/* ADC switch control */
	62	SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2, AD1836_ADCL1_MUTE,
	63	AD1836_ADCR1_MUTE, 1, 1),
	64	SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2, AD1836_ADCL2_MUTE,
	65	AD1836_ADCR2_MUTE, 1, 1),
	66
	67	/* DAC switch control */
	68	SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2, AD1836_DACL1_MUTE,
	69	AD1836_DACR1_MUTE, 1, 1),
	70	SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2, AD1836_DACL2_MUTE,
	71	AD1836_DACR2_MUTE, 1, 1),
	72	SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2, AD1836_DACL3_MUTE,
	73	AD1836_DACR3_MUTE, 1, 1),
	74
	75	/* ADC high-pass filter */
	76	SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
	77	AD1836_ADC_HIGHPASS_FILTER, 1, 0),
	78
	79	/* DAC de-emphasis */
	80	SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
	81	};
	82
	83	static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = {
	84	SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
85	AD1836_DAC_POWERDOWN, 1),
86	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
87	SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
88	AD1836_ADC_POWERDOWN, 1, NULL, 0),
89	SND_SOC_DAPM_OUTPUT("DAC1OUT"),
90	SND_SOC_DAPM_OUTPUT("DAC2OUT"),
91	SND_SOC_DAPM_OUTPUT("DAC3OUT"),
92	SND_SOC_DAPM_INPUT("ADC1IN"),
93	SND_SOC_DAPM_INPUT("ADC2IN"),
94	};
95
96	static const struct snd_soc_dapm_route audio_paths[] = {
97	{ "DAC", NULL, "ADC_PWR" },
98	{ "ADC", NULL, "ADC_PWR" },
99	{ "DAC1OUT", "DAC1 Switch", "DAC" },
100	{ "DAC2OUT", "DAC2 Switch", "DAC" },
101	{ "DAC3OUT", "DAC3 Switch", "DAC" },
102	{ "ADC", "ADC1 Switch", "ADC1IN" },
103	{ "ADC", "ADC2 Switch", "ADC2IN" },
104	};
105
106	/*
107	* DAI ops entries
108	*/
109
110	static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
111	unsigned int fmt)
112	{
113	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
114	/* at present, we support adc aux mode to interface with
115	* blackfin sport tdm mode
116	*/
117	case SND_SOC_DAIFMT_DSP_A:
118	break;
119	default:
120	return -EINVAL;
121	}
122
123	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
124	case SND_SOC_DAIFMT_IB_IF:
125	break;
126	default:
127	return -EINVAL;
128	}
129
130	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
131	/* ALCLK,ABCLK are both output, AD1836 can only be master */
132	case SND_SOC_DAIFMT_CBM_CFM:
133	break;
134	default:
135	return -EINVAL;
136	}
137
138	return 0;
139	}
140
141	static int ad1836_hw_params(struct snd_pcm_substream *substream,
142	struct snd_pcm_hw_params *params,
143	struct snd_soc_dai *dai)
144	{
145	int word_len = 0;
146
147	struct snd_soc_pcm_runtime *rtd = substream->private_data;
148	struct snd_soc_device *socdev = rtd->socdev;
149	struct snd_soc_codec *codec = socdev->card->codec;
150
151	/* bit size */
152	switch (params_format(params)) {
153	case SNDRV_PCM_FORMAT_S16_LE:
154	word_len = 3;
155	break;
156	case SNDRV_PCM_FORMAT_S20_3LE:
157	word_len = 1;
158	break;
159	case SNDRV_PCM_FORMAT_S24_LE:
160	case SNDRV_PCM_FORMAT_S32_LE:
161	word_len = 0;
162	break;
163	}
164
165	snd_soc_update_bits(codec, AD1836_DAC_CTRL1,
166	AD1836_DAC_WORD_LEN_MASK, word_len);
167
168	snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
169	AD1836_ADC_WORD_LEN_MASK, word_len);
170
171	return 0;
172	}
173
84549d23 BS	174	#ifdef CONFIG_PM
	175	static int ad1836_soc_suspend(struct platform_device *pdev,
	176	pm_message_t state)
	177	{
	178	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	179	struct snd_soc_codec *codec = socdev->card->codec;
	180
	181	/* reset clock control mode */
63b62ab0	182	u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
84549d23 BS	183	adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
84549d23 BS	184
63b62ab0	185	return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
84549d23 BS	186	}
	187
	188	static int ad1836_soc_resume(struct platform_device *pdev)
	189	{
	190	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	191	struct snd_soc_codec *codec = socdev->card->codec;
	192
	193	/* restore clock control mode */
63b62ab0	194	u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
84549d23 BS	195	adc_ctrl2 \|= AD1836_ADC_AUX;
84549d23 BS	196
63b62ab0	197	return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
84549d23 BS	198	}
	199	#else
	200	#define ad1836_soc_suspend NULL
	201	#define ad1836_soc_resume NULL
	202	#endif
	203
7eaae41e BS	204	static int __devinit ad1836_spi_probe(struct spi_device *spi)
	205	{
	206	struct snd_soc_codec *codec;
	207	struct ad1836_priv *ad1836;
	208
	209	ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
	210	if (ad1836 == NULL)
	211	return -ENOMEM;
	212
	213	codec = &ad1836->codec;
	214	codec->control_data = spi;
	215	codec->dev = &spi->dev;
	216
	217	dev_set_drvdata(&spi->dev, ad1836);
	218
	219	return ad1836_register(ad1836);
	220	}
	221
	222	static int __devexit ad1836_spi_remove(struct spi_device *spi)
	223	{
	224	struct ad1836_priv *ad1836 = dev_get_drvdata(&spi->dev);
	225
	226	ad1836_unregister(ad1836);
	227	return 0;
	228	}
	229
	230	static struct spi_driver ad1836_spi_driver = {
	231	.driver = {
98235a4b	232	.name = "ad1836",
7eaae41e BS	233	.owner = THIS_MODULE,
	234	},
	235	.probe = ad1836_spi_probe,
	236	.remove = __devexit_p(ad1836_spi_remove),
	237	};
	238
	239	static struct snd_soc_dai_ops ad1836_dai_ops = {
	240	.hw_params = ad1836_hw_params,
	241	.set_fmt = ad1836_set_dai_fmt,
	242	};
	243
	244	/* codec DAI instance */
	245	struct snd_soc_dai ad1836_dai = {
	246	.name = "AD1836",
	247	.playback = {
	248	.stream_name = "Playback",
	249	.channels_min = 2,
	250	.channels_max = 6,
	251	.rates = SNDRV_PCM_RATE_48000,
	252	.formats = SNDRV_PCM_FMTBIT_S32_LE \| SNDRV_PCM_FMTBIT_S16_LE \|
	253	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S24_LE,
	254	},
	255	.capture = {
	256	.stream_name = "Capture",
	257	.channels_min = 2,
	258	.channels_max = 4,
	259	.rates = SNDRV_PCM_RATE_48000,
	260	.formats = SNDRV_PCM_FMTBIT_S32_LE \| SNDRV_PCM_FMTBIT_S16_LE \|
	261	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S24_LE,
	262	},
	263	.ops = &ad1836_dai_ops,
	264	};
	265	EXPORT_SYMBOL_GPL(ad1836_dai);
	266
	267	static int ad1836_register(struct ad1836_priv *ad1836)
	268	{
	269	int ret;
	270	struct snd_soc_codec *codec = &ad1836->codec;
	271
	272	if (ad1836_codec) {
	273	dev_err(codec->dev, "Another ad1836 is registered\n");
	274	return -EINVAL;
	275	}
	276
	277	mutex_init(&codec->mutex);
	278	INIT_LIST_HEAD(&codec->dapm_widgets);
	279	INIT_LIST_HEAD(&codec->dapm_paths);
b2c812e2	280	snd_soc_codec_set_drvdata(codec, ad1836);
7eaae41e BS	281	codec->reg_cache = ad1836->reg_cache;
	282	codec->reg_cache_size = AD1836_NUM_REGS;
	283	codec->name = "AD1836";
	284	codec->owner = THIS_MODULE;
	285	codec->dai = &ad1836_dai;
	286	codec->num_dai = 1;
7eaae41e BS	287	INIT_LIST_HEAD(&codec->dapm_widgets);
	288	INIT_LIST_HEAD(&codec->dapm_paths);
	289
	290	ad1836_dai.dev = codec->dev;
	291	ad1836_codec = codec;
	292
63b62ab0 BS	293	ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
	294	if (ret < 0) {
	295	dev_err(codec->dev, "failed to set cache I/O: %d\n",
	296	ret);
	297	kfree(ad1836);
	298	return ret;
	299	}
	300
7eaae41e BS	301	/* default setting for ad1836 */
7eaae41e BS	302	/* de-emphasis: 48kHz, power-on dac */
63b62ab0	303	snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
7eaae41e	304	/* unmute dac channels */
63b62ab0	305	snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
7eaae41e	306	/* high-pass filter enable, power-on adc */
63b62ab0	307	snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
7eaae41e	308	/* unmute adc channles, adc aux mode */
63b62ab0	309	snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
7eaae41e	310	/* left/right diff:PGA/MUX */
63b62ab0	311	snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
7eaae41e	312	/* volume */
63b62ab0 BS	313	snd_soc_write(codec, AD1836_DAC_L1_VOL, 0x3FF);
	314	snd_soc_write(codec, AD1836_DAC_R1_VOL, 0x3FF);
	315	snd_soc_write(codec, AD1836_DAC_L2_VOL, 0x3FF);
	316	snd_soc_write(codec, AD1836_DAC_R2_VOL, 0x3FF);
	317	snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF);
	318	snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF);
7eaae41e BS	319
	320	ret = snd_soc_register_codec(codec);
	321	if (ret != 0) {
	322	dev_err(codec->dev, "Failed to register codec: %d\n", ret);
	323	kfree(ad1836);
	324	return ret;
	325	}
	326
	327	ret = snd_soc_register_dai(&ad1836_dai);
	328	if (ret != 0) {
	329	dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
	330	snd_soc_unregister_codec(codec);
	331	kfree(ad1836);
	332	return ret;
	333	}
	334
	335	return 0;
	336	}
	337
	338	static void ad1836_unregister(struct ad1836_priv *ad1836)
	339	{
	340	snd_soc_unregister_dai(&ad1836_dai);
	341	snd_soc_unregister_codec(&ad1836->codec);
	342	kfree(ad1836);
	343	ad1836_codec = NULL;
	344	}
	345
	346	static int ad1836_probe(struct platform_device *pdev)
	347	{
	348	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	349	struct snd_soc_codec *codec;
	350	int ret = 0;
	351
	352	if (ad1836_codec == NULL) {
	353	dev_err(&pdev->dev, "Codec device not registered\n");
	354	return -ENODEV;
	355	}
	356
	357	socdev->card->codec = ad1836_codec;
	358	codec = ad1836_codec;
	359
	360	/* register pcms */
	361	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	362	if (ret < 0) {
	363	dev_err(codec->dev, "failed to create pcms: %d\n", ret);
	364	goto pcm_err;
	365	}
	366
	367	snd_soc_add_controls(codec, ad1836_snd_controls,
	368	ARRAY_SIZE(ad1836_snd_controls));
	369	snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets,
	370	ARRAY_SIZE(ad1836_dapm_widgets));
	371	snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
7eaae41e	372
7eaae41e BS	373	pcm_err:
	374	return ret;
	375	}
	376
	377	/* power down chip */
	378	static int ad1836_remove(struct platform_device *pdev)
	379	{
	380	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	381
	382	snd_soc_free_pcms(socdev);
	383	snd_soc_dapm_free(socdev);
	384
	385	return 0;
	386	}
	387
	388	struct snd_soc_codec_device soc_codec_dev_ad1836 = {
	389	.probe = ad1836_probe,
	390	.remove = ad1836_remove,
84549d23 BS	391	.suspend = ad1836_soc_suspend,
84549d23 BS	392	.resume = ad1836_soc_resume,
7eaae41e BS	393	};
	394	EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836);
	395
	396	static int __init ad1836_init(void)
	397	{
	398	int ret;
	399
	400	ret = spi_register_driver(&ad1836_spi_driver);
	401	if (ret != 0) {
	402	printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n",
	403	ret);
	404	}
	405
	406	return ret;
	407	}
	408	module_init(ad1836_init);
	409
	410	static void __exit ad1836_exit(void)
	411	{
	412	spi_unregister_driver(&ad1836_spi_driver);
	413	}
	414	module_exit(ad1836_exit);
	415
	416	MODULE_DESCRIPTION("ASoC ad1836 driver");
	417	MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
	418	MODULE_LICENSE("GPL");