[deliverable/linux.git] / sound / soc / codecs / sti-sas.c

/*
 * Copyright (C) STMicroelectronics SA 2015
 * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
 *          for STMicroelectronics.
 * License terms:  GNU General Public License (GPL), version 2
 */

#include <linux/io.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/mfd/syscon.h>

#include <sound/soc.h>
#include <sound/soc-dapm.h>

/* chipID supported */
#define CHIPID_STIH416 0
#define CHIPID_STIH407 1

/* DAC definitions */

/* stih416 DAC registers */
/* sysconf 2517: Audio-DAC-Control */
#define STIH416_AUDIO_DAC_CTRL 0x00000814
/* sysconf 2519: Audio-Gue-Control */
#define STIH416_AUDIO_GLUE_CTRL 0x0000081C

#define STIH416_DAC_NOT_STANDBY	0x3
#define STIH416_DAC_SOFTMUTE	0x4
#define STIH416_DAC_ANA_NOT_PWR	0x5
#define STIH416_DAC_NOT_PNDBG	0x6

#define STIH416_DAC_NOT_STANDBY_MASK	BIT(STIH416_DAC_NOT_STANDBY)
#define STIH416_DAC_SOFTMUTE_MASK	BIT(STIH416_DAC_SOFTMUTE)
#define STIH416_DAC_ANA_NOT_PWR_MASK	BIT(STIH416_DAC_ANA_NOT_PWR)
#define STIH416_DAC_NOT_PNDBG_MASK	BIT(STIH416_DAC_NOT_PNDBG)

/* stih407 DAC registers */
/* sysconf 5041: Audio-Gue-Control */
#define STIH407_AUDIO_GLUE_CTRL 0x000000A4
/* sysconf 5042: Audio-DAC-Control */
#define STIH407_AUDIO_DAC_CTRL 0x000000A8

/* DAC definitions */
#define STIH407_DAC_SOFTMUTE		0x0
#define STIH407_DAC_STANDBY_ANA		0x1
#define STIH407_DAC_STANDBY		0x2

#define STIH407_DAC_SOFTMUTE_MASK	BIT(STIH407_DAC_SOFTMUTE)
#define STIH407_DAC_STANDBY_ANA_MASK    BIT(STIH407_DAC_STANDBY_ANA)
#define STIH407_DAC_STANDBY_MASK        BIT(STIH407_DAC_STANDBY)

/* SPDIF definitions */
#define SPDIF_BIPHASE_ENABLE		0x6
#define SPDIF_BIPHASE_IDLE		0x7

#define SPDIF_BIPHASE_ENABLE_MASK	BIT(SPDIF_BIPHASE_ENABLE)
#define SPDIF_BIPHASE_IDLE_MASK		BIT(SPDIF_BIPHASE_IDLE)

enum {
	STI_SAS_DAI_SPDIF_OUT,
	STI_SAS_DAI_ANALOG_OUT,
};

static const struct reg_default stih416_sas_reg_defaults[] = {
	{ STIH407_AUDIO_GLUE_CTRL, 0x00000040 },
	{ STIH407_AUDIO_DAC_CTRL, 0x000000000 },
};

static const struct reg_default stih407_sas_reg_defaults[] = {
	{ STIH416_AUDIO_DAC_CTRL, 0x000000000 },
	{ STIH416_AUDIO_GLUE_CTRL, 0x00000040 },
};

struct sti_dac_audio {
	struct regmap *regmap;
	struct regmap *virt_regmap;
	struct regmap_field  **field;
	struct reset_control *rst;
	int mclk;
};

struct sti_spdif_audio {
	struct regmap *regmap;
	struct regmap_field  **field;
	int mclk;
};

/* device data structure */
struct sti_sas_dev_data {
	const int chipid; /* IC version */
	const struct regmap_config *regmap;
	const struct snd_soc_dai_ops *dac_ops;  /* DAC function callbacks */
	const struct snd_soc_dapm_widget *dapm_widgets; /* dapms declaration */
	const int num_dapm_widgets; /* dapms declaration */
	const struct snd_soc_dapm_route *dapm_routes; /* route declaration */
	const int num_dapm_routes; /* route declaration */
};

/* driver data structure */
struct sti_sas_data {
	struct device *dev;
	const struct sti_sas_dev_data *dev_data;
	struct sti_dac_audio dac;
	struct sti_spdif_audio spdif;
};

/* Read a register from the sysconf reg bank */
static int sti_sas_read_reg(void *context, unsigned int reg,
			    unsigned int *value)
{
	struct sti_sas_data *drvdata = context;
	int status;
	u32 val;

	status = regmap_read(drvdata->dac.regmap, reg, &val);
	*value = (unsigned int)val;

	return status;
}

/* Read a register from the sysconf reg bank */
static int sti_sas_write_reg(void *context, unsigned int reg,
			     unsigned int value)
{
	struct sti_sas_data *drvdata = context;
	int status;

	status = regmap_write(drvdata->dac.regmap, reg, value);

	return status;
}

static int  sti_sas_init_sas_registers(struct snd_soc_codec *codec,
				       struct sti_sas_data *data)
{
	int ret;
	/*
	 * DAC and SPDIF are activated by default
	 * put them in IDLE to save power
	 */

	/* Initialise bi-phase formatter to disabled */
	ret = snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
				  SPDIF_BIPHASE_ENABLE_MASK, 0);

	if (!ret)
		/* Initialise bi-phase formatter idle value to 0 */
		ret = snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
					  SPDIF_BIPHASE_IDLE_MASK, 0);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to update SPDIF registers");
		return ret;
	}

	/* Init DAC configuration */
	switch (data->dev_data->chipid) {
	case CHIPID_STIH407:
		/* init configuration */
		ret =  snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
					   STIH407_DAC_STANDBY_MASK,
					   STIH407_DAC_STANDBY_MASK);

		if (!ret)
			ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
						  STIH407_DAC_STANDBY_ANA_MASK,
						  STIH407_DAC_STANDBY_ANA_MASK);
		if (!ret)
			ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
						  STIH407_DAC_SOFTMUTE_MASK,
						  STIH407_DAC_SOFTMUTE_MASK);
		break;
	case CHIPID_STIH416:
		ret =  snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
					   STIH416_DAC_NOT_STANDBY_MASK, 0);
		if (!ret)
			ret =  snd_soc_update_bits(codec,
						   STIH416_AUDIO_DAC_CTRL,
						   STIH416_DAC_ANA_NOT_PWR, 0);
		if (!ret)
			ret =  snd_soc_update_bits(codec,
						   STIH416_AUDIO_DAC_CTRL,
						   STIH416_DAC_NOT_PNDBG_MASK,
						   0);
		if (!ret)
			ret =  snd_soc_update_bits(codec,
						   STIH416_AUDIO_DAC_CTRL,
						   STIH416_DAC_SOFTMUTE_MASK,
						   STIH416_DAC_SOFTMUTE_MASK);
		break;
	default:
		return -EINVAL;
	}

	if (ret < 0) {
		dev_err(codec->dev, "Failed to update DAC registers");
		return ret;
	}

	return ret;
}

/*
 * DAC
 */
static int sti_sas_dac_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	/* Sanity check only */
	if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
		dev_err(dai->codec->dev,
			"%s: ERROR: Unsupporter master mask 0x%x\n",
			__func__, fmt & SND_SOC_DAIFMT_MASTER_MASK);
		return -EINVAL;
	}

	return 0;
}

static int stih416_dac_probe(struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
	struct sti_dac_audio *dac = &drvdata->dac;

	/* Get reset control */
	dac->rst = devm_reset_control_get(codec->dev, "dac_rst");
	if (IS_ERR(dac->rst)) {
		dev_err(dai->codec->dev,
			"%s: ERROR: DAC reset control not defined !\n",
			__func__);
		dac->rst = NULL;
		return -EFAULT;
	}
	/* Put the DAC into reset */
	reset_control_assert(dac->rst);

	return 0;
}

static const struct snd_soc_dapm_widget stih416_sas_dapm_widgets[] = {
	SND_SOC_DAPM_PGA("DAC bandgap", STIH416_AUDIO_DAC_CTRL,
			 STIH416_DAC_NOT_PNDBG_MASK, 0, NULL, 0),
	SND_SOC_DAPM_OUT_DRV("DAC standby ana", STIH416_AUDIO_DAC_CTRL,
			     STIH416_DAC_ANA_NOT_PWR, 0, NULL, 0),
	SND_SOC_DAPM_DAC("DAC standby",  "dac_p", STIH416_AUDIO_DAC_CTRL,
			 STIH416_DAC_NOT_STANDBY, 0),
	SND_SOC_DAPM_OUTPUT("DAC Output"),
};

static const struct snd_soc_dapm_widget stih407_sas_dapm_widgets[] = {
	SND_SOC_DAPM_OUT_DRV("DAC standby ana", STIH407_AUDIO_DAC_CTRL,
			     STIH407_DAC_STANDBY_ANA, 1, NULL, 0),
	SND_SOC_DAPM_DAC("DAC standby",  "dac_p", STIH407_AUDIO_DAC_CTRL,
			 STIH407_DAC_STANDBY, 1),
	SND_SOC_DAPM_OUTPUT("DAC Output"),
};

static const struct snd_soc_dapm_route stih416_sas_route[] = {
	{"DAC Output", NULL, "DAC bandgap"},
	{"DAC Output", NULL, "DAC standby ana"},
	{"DAC standby ana", NULL, "DAC standby"},
};

static const struct snd_soc_dapm_route stih407_sas_route[] = {
	{"DAC Output", NULL, "DAC standby ana"},
	{"DAC standby ana", NULL, "DAC standby"},
};

static int stih416_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream)
{
	struct snd_soc_codec *codec = dai->codec;

	if (mute) {
		return snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
					    STIH416_DAC_SOFTMUTE_MASK,
					    STIH416_DAC_SOFTMUTE_MASK);
	} else {
		return snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
					    STIH416_DAC_SOFTMUTE_MASK, 0);
	}
}

static int stih407_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream)
{
	struct snd_soc_codec *codec = dai->codec;

	if (mute) {
		return snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
					    STIH407_DAC_SOFTMUTE_MASK,
					    STIH407_DAC_SOFTMUTE_MASK);
	} else {
		return snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
					    STIH407_DAC_SOFTMUTE_MASK,
					    0);
	}
}

/*
 * SPDIF
 */
static int sti_sas_spdif_set_fmt(struct snd_soc_dai *dai,
				 unsigned int fmt)
{
	if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
		dev_err(dai->codec->dev,
			"%s: ERROR: Unsupporter master mask 0x%x\n",
			__func__, fmt & SND_SOC_DAIFMT_MASTER_MASK);
		return -EINVAL;
	}

	return 0;
}

/*
 * sti_sas_spdif_trigger:
 * Trigger function is used to ensure that BiPhase Formater is disabled
 * before CPU dai is stopped.
 * This is mandatory to avoid that BPF is stalled
 */
static int sti_sas_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
				 struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		return snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
					    SPDIF_BIPHASE_ENABLE_MASK,
					    SPDIF_BIPHASE_ENABLE_MASK);
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
		return snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
					    SPDIF_BIPHASE_ENABLE_MASK,
					    0);
	default:
		return -EINVAL;
	}
}

static bool sti_sas_volatile_register(struct device *dev, unsigned int reg)
{
	if (reg == STIH407_AUDIO_GLUE_CTRL)
		return true;

	return false;
}

/*
 * CODEC DAIS
 */

/*
 * sti_sas_set_sysclk:
 * get MCLK input frequency to check that MCLK-FS ratio is coherent
 */
static int sti_sas_set_sysclk(struct snd_soc_dai *dai, int clk_id,
			      unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = dai->codec;
	struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);

	if (dir == SND_SOC_CLOCK_OUT)
		return 0;

	if (clk_id != 0)
		return -EINVAL;

	switch (dai->id) {
	case STI_SAS_DAI_SPDIF_OUT:
		drvdata->spdif.mclk = freq;
		break;

	case STI_SAS_DAI_ANALOG_OUT:
		drvdata->dac.mclk = freq;
		break;
	}

	return 0;
}

static int sti_sas_prepare(struct snd_pcm_substream *substream,
			   struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
	struct snd_pcm_runtime *runtime = substream->runtime;

	switch (dai->id) {
	case STI_SAS_DAI_SPDIF_OUT:
		if ((drvdata->spdif.mclk / runtime->rate) != 128) {
			dev_err(codec->dev, "unexpected mclk-fs ratio");
			return -EINVAL;
		}
		break;
	case STI_SAS_DAI_ANALOG_OUT:
		if ((drvdata->dac.mclk / runtime->rate) != 256) {
			dev_err(codec->dev, "unexpected mclk-fs ratio");
			return -EINVAL;
		}
		break;
	}

	return 0;
}

static const struct snd_soc_dai_ops stih416_dac_ops = {
	.set_fmt = sti_sas_dac_set_fmt,
	.mute_stream = stih416_sas_dac_mute,
	.prepare = sti_sas_prepare,
	.set_sysclk = sti_sas_set_sysclk,
};

static const struct snd_soc_dai_ops stih407_dac_ops = {
	.set_fmt = sti_sas_dac_set_fmt,
	.mute_stream = stih407_sas_dac_mute,
	.prepare = sti_sas_prepare,
	.set_sysclk = sti_sas_set_sysclk,
};

static const struct regmap_config stih407_sas_regmap = {
	.reg_bits = 32,
	.val_bits = 32,

	.max_register = STIH407_AUDIO_DAC_CTRL,
	.reg_defaults = stih407_sas_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(stih407_sas_reg_defaults),
	.volatile_reg = sti_sas_volatile_register,
	.cache_type = REGCACHE_RBTREE,
	.reg_read = sti_sas_read_reg,
	.reg_write = sti_sas_write_reg,
};

static const struct regmap_config stih416_sas_regmap = {
	.reg_bits = 32,
	.val_bits = 32,

	.max_register = STIH416_AUDIO_DAC_CTRL,
	.reg_defaults = stih416_sas_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(stih416_sas_reg_defaults),
	.volatile_reg = sti_sas_volatile_register,
	.cache_type = REGCACHE_RBTREE,
	.reg_read = sti_sas_read_reg,
	.reg_write = sti_sas_write_reg,
};

static const struct sti_sas_dev_data stih416_data = {
	.chipid = CHIPID_STIH416,
	.regmap = &stih416_sas_regmap,
	.dac_ops = &stih416_dac_ops,
	.dapm_widgets = stih416_sas_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(stih416_sas_dapm_widgets),
	.dapm_routes =	stih416_sas_route,
	.num_dapm_routes = ARRAY_SIZE(stih416_sas_route),
};

static const struct sti_sas_dev_data stih407_data = {
	.chipid = CHIPID_STIH407,
	.regmap = &stih407_sas_regmap,
	.dac_ops = &stih407_dac_ops,
	.dapm_widgets = stih407_sas_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(stih407_sas_dapm_widgets),
	.dapm_routes =	stih407_sas_route,
	.num_dapm_routes = ARRAY_SIZE(stih407_sas_route),
};

static struct snd_soc_dai_driver sti_sas_dai[] = {
	{
		.name = "sas-dai-spdif-out",
		.id = STI_SAS_DAI_SPDIF_OUT,
		.playback = {
			.stream_name = "spdif_p",
			.channels_min = 2,
			.channels_max = 2,
			.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
				 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 |
				 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
				 SNDRV_PCM_RATE_192000,
			.formats = SNDRV_PCM_FMTBIT_S16_LE |
				   SNDRV_PCM_FMTBIT_S32_LE,
		},
		.ops = (struct snd_soc_dai_ops[]) {
			{
				.set_fmt = sti_sas_spdif_set_fmt,
				.trigger = sti_sas_spdif_trigger,
				.set_sysclk = sti_sas_set_sysclk,
				.prepare = sti_sas_prepare,
			}
		},
	},
	{
		.name = "sas-dai-dac",
		.id = STI_SAS_DAI_ANALOG_OUT,
		.playback = {
			.stream_name = "dac_p",
			.channels_min = 2,
			.channels_max = 2,
			.rates = SNDRV_PCM_RATE_8000_48000,
			.formats = SNDRV_PCM_FMTBIT_S16_LE |
				   SNDRV_PCM_FMTBIT_S32_LE,
		},
	},
};

#ifdef CONFIG_PM_SLEEP
static int sti_sas_resume(struct snd_soc_codec *codec)
{
	struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);

	return sti_sas_init_sas_registers(codec, drvdata);
}
#else
#define sti_sas_resume NULL
#endif

static int sti_sas_codec_probe(struct snd_soc_codec *codec)
{
	struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
	int ret;

	ret = sti_sas_init_sas_registers(codec, drvdata);

	return ret;
}

static struct snd_soc_codec_driver sti_sas_driver = {
	.probe = sti_sas_codec_probe,
	.resume = sti_sas_resume,
};

static const struct of_device_id sti_sas_dev_match[] = {
	{
		.compatible = "st,stih416-sas-codec",
		.data = &stih416_data,
	},
	{
		.compatible = "st,stih407-sas-codec",
		.data = &stih407_data,
	},
	{},
};

static int sti_sas_driver_probe(struct platform_device *pdev)
{
	struct device_node *pnode = pdev->dev.of_node;
	struct sti_sas_data *drvdata;
	const struct of_device_id *of_id;

	/* Allocate device structure */
	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct sti_sas_data),
			       GFP_KERNEL);
	if (!drvdata)
		return -ENOMEM;

	/* Populate data structure depending on compatibility */
	of_id = of_match_node(sti_sas_dev_match, pnode);
	if (!of_id->data) {
		dev_err(&pdev->dev, "data associated to device is missing");
		return -EINVAL;
	}

	drvdata->dev_data = (struct sti_sas_dev_data *)of_id->data;

	/* Initialise device structure */
	drvdata->dev = &pdev->dev;

	/* Request the DAC & SPDIF registers memory region */
	drvdata->dac.virt_regmap = devm_regmap_init(&pdev->dev, NULL, drvdata,
						    drvdata->dev_data->regmap);
	if (IS_ERR(drvdata->dac.virt_regmap)) {
		dev_err(&pdev->dev, "audio registers not enabled\n");
		return PTR_ERR(drvdata->dac.virt_regmap);
	}

	/* Request the syscon region */
	drvdata->dac.regmap =
		syscon_regmap_lookup_by_phandle(pnode, "st,syscfg");
	if (IS_ERR(drvdata->dac.regmap)) {
		dev_err(&pdev->dev, "syscon registers not available\n");
		return PTR_ERR(drvdata->dac.regmap);
	}
	drvdata->spdif.regmap = drvdata->dac.regmap;

	/* Set DAC dai probe */
	if (drvdata->dev_data->chipid == CHIPID_STIH416)
		sti_sas_dai[STI_SAS_DAI_ANALOG_OUT].probe = stih416_dac_probe;

	sti_sas_dai[STI_SAS_DAI_ANALOG_OUT].ops = drvdata->dev_data->dac_ops;

	/* Set dapms*/
	sti_sas_driver.component_driver.dapm_widgets = drvdata->dev_data->dapm_widgets;
	sti_sas_driver.component_driver.num_dapm_widgets = drvdata->dev_data->num_dapm_widgets;

	sti_sas_driver.component_driver.dapm_routes = drvdata->dev_data->dapm_routes;
	sti_sas_driver.component_driver.num_dapm_routes = drvdata->dev_data->num_dapm_routes;

	/* Store context */
	dev_set_drvdata(&pdev->dev, drvdata);

	return snd_soc_register_codec(&pdev->dev, &sti_sas_driver,
					sti_sas_dai,
					ARRAY_SIZE(sti_sas_dai));
}

static int sti_sas_driver_remove(struct platform_device *pdev)
{
	snd_soc_unregister_codec(&pdev->dev);

	return 0;
}

static struct platform_driver sti_sas_platform_driver = {
	.driver = {
		.name = "sti-sas-codec",
		.of_match_table = sti_sas_dev_match,
	},
	.probe = sti_sas_driver_probe,
	.remove = sti_sas_driver_remove,
};

module_platform_driver(sti_sas_platform_driver);

MODULE_DESCRIPTION("audio codec for STMicroelectronics sti platforms");
MODULE_AUTHOR("Arnaud.pouliquen@st.com");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
32a726b2 AP	1	/*
	2	* Copyright (C) STMicroelectronics SA 2015
	3	* Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
	4	* for STMicroelectronics.
	5	* License terms: GNU General Public License (GPL), version 2
	6	*/
	7
	8	#include <linux/io.h>
	9	#include <linux/module.h>
	10	#include <linux/regmap.h>
	11	#include <linux/reset.h>
	12	#include <linux/mfd/syscon.h>
	13
	14	#include <sound/soc.h>
	15	#include <sound/soc-dapm.h>
	16
	17	/* chipID supported */
	18	#define CHIPID_STIH416 0
	19	#define CHIPID_STIH407 1
	20
	21	/* DAC definitions */
	22
	23	/* stih416 DAC registers */
	24	/* sysconf 2517: Audio-DAC-Control */
	25	#define STIH416_AUDIO_DAC_CTRL 0x00000814
	26	/* sysconf 2519: Audio-Gue-Control */
	27	#define STIH416_AUDIO_GLUE_CTRL 0x0000081C
	28
	29	#define STIH416_DAC_NOT_STANDBY 0x3
	30	#define STIH416_DAC_SOFTMUTE 0x4
	31	#define STIH416_DAC_ANA_NOT_PWR 0x5
	32	#define STIH416_DAC_NOT_PNDBG 0x6
	33
	34	#define STIH416_DAC_NOT_STANDBY_MASK BIT(STIH416_DAC_NOT_STANDBY)
	35	#define STIH416_DAC_SOFTMUTE_MASK BIT(STIH416_DAC_SOFTMUTE)
	36	#define STIH416_DAC_ANA_NOT_PWR_MASK BIT(STIH416_DAC_ANA_NOT_PWR)
	37	#define STIH416_DAC_NOT_PNDBG_MASK BIT(STIH416_DAC_NOT_PNDBG)
	38
	39	/* stih407 DAC registers */
	40	/* sysconf 5041: Audio-Gue-Control */
	41	#define STIH407_AUDIO_GLUE_CTRL 0x000000A4
	42	/* sysconf 5042: Audio-DAC-Control */
	43	#define STIH407_AUDIO_DAC_CTRL 0x000000A8
	44
	45	/* DAC definitions */
	46	#define STIH407_DAC_SOFTMUTE 0x0
	47	#define STIH407_DAC_STANDBY_ANA 0x1
	48	#define STIH407_DAC_STANDBY 0x2
	49
	50	#define STIH407_DAC_SOFTMUTE_MASK BIT(STIH407_DAC_SOFTMUTE)
	51	#define STIH407_DAC_STANDBY_ANA_MASK BIT(STIH407_DAC_STANDBY_ANA)
	52	#define STIH407_DAC_STANDBY_MASK BIT(STIH407_DAC_STANDBY)
	53
	54	/* SPDIF definitions */
	55	#define SPDIF_BIPHASE_ENABLE 0x6
	56	#define SPDIF_BIPHASE_IDLE 0x7
	57
	58	#define SPDIF_BIPHASE_ENABLE_MASK BIT(SPDIF_BIPHASE_ENABLE)
	59	#define SPDIF_BIPHASE_IDLE_MASK BIT(SPDIF_BIPHASE_IDLE)
	60
	61	enum {
	62	STI_SAS_DAI_SPDIF_OUT,
	63	STI_SAS_DAI_ANALOG_OUT,
	64	};
65
66	static const struct reg_default stih416_sas_reg_defaults[] = {
67	{ STIH407_AUDIO_GLUE_CTRL, 0x00000040 },
68	{ STIH407_AUDIO_DAC_CTRL, 0x000000000 },
69	};
70
71	static const struct reg_default stih407_sas_reg_defaults[] = {
72	{ STIH416_AUDIO_DAC_CTRL, 0x000000000 },
73	{ STIH416_AUDIO_GLUE_CTRL, 0x00000040 },
74	};
75
76	struct sti_dac_audio {
77	struct regmap *regmap;
78	struct regmap *virt_regmap;
79	struct regmap_field **field;
80	struct reset_control *rst;
81	int mclk;
82	};
83
84	struct sti_spdif_audio {
85	struct regmap *regmap;
86	struct regmap_field **field;
87	int mclk;
88	};
89
90	/* device data structure */
91	struct sti_sas_dev_data {
92	const int chipid; /* IC version */
93	const struct regmap_config *regmap;
94	const struct snd_soc_dai_ops dac_ops; / DAC function callbacks */
95	const struct snd_soc_dapm_widget dapm_widgets; / dapms declaration */
96	const int num_dapm_widgets; /* dapms declaration */
97	const struct snd_soc_dapm_route dapm_routes; / route declaration */
98	const int num_dapm_routes; /* route declaration */
99	};
100
101	/* driver data structure */
102	struct sti_sas_data {
103	struct device *dev;
104	const struct sti_sas_dev_data *dev_data;
105	struct sti_dac_audio dac;
106	struct sti_spdif_audio spdif;
107	};
108
109	/* Read a register from the sysconf reg bank */
110	static int sti_sas_read_reg(void *context, unsigned int reg,
111	unsigned int *value)
112	{
113	struct sti_sas_data *drvdata = context;
114	int status;
115	u32 val;
116
117	status = regmap_read(drvdata->dac.regmap, reg, &val);
118	*value = (unsigned int)val;
119
120	return status;
121	}
122
123	/* Read a register from the sysconf reg bank */
124	static int sti_sas_write_reg(void *context, unsigned int reg,
125	unsigned int value)
126	{
127	struct sti_sas_data *drvdata = context;
128	int status;
129
130	status = regmap_write(drvdata->dac.regmap, reg, value);
131
132	return status;
133	}
134
135	static int sti_sas_init_sas_registers(struct snd_soc_codec *codec,
136	struct sti_sas_data *data)
137	{
138	int ret;
139	/*
140	* DAC and SPDIF are activated by default
141	* put them in IDLE to save power
142	*/
143
144	/* Initialise bi-phase formatter to disabled */
145	ret = snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
146	SPDIF_BIPHASE_ENABLE_MASK, 0);
147
148	if (!ret)
149	/* Initialise bi-phase formatter idle value to 0 */
150	ret = snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
151	SPDIF_BIPHASE_IDLE_MASK, 0);
152	if (ret < 0) {
153	dev_err(codec->dev, "Failed to update SPDIF registers");
154	return ret;
155	}
156
157	/* Init DAC configuration */
158	switch (data->dev_data->chipid) {
159	case CHIPID_STIH407:
160	/* init configuration */
161	ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
162	STIH407_DAC_STANDBY_MASK,
163	STIH407_DAC_STANDBY_MASK);
164
165	if (!ret)
166	ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
167	STIH407_DAC_STANDBY_ANA_MASK,
168	STIH407_DAC_STANDBY_ANA_MASK);
169	if (!ret)
170	ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
171	STIH407_DAC_SOFTMUTE_MASK,
172	STIH407_DAC_SOFTMUTE_MASK);
173	break;
174	case CHIPID_STIH416:
175	ret = snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
176	STIH416_DAC_NOT_STANDBY_MASK, 0);
177	if (!ret)
178	ret = snd_soc_update_bits(codec,
179	STIH416_AUDIO_DAC_CTRL,
180	STIH416_DAC_ANA_NOT_PWR, 0);
181	if (!ret)
182	ret = snd_soc_update_bits(codec,
183	STIH416_AUDIO_DAC_CTRL,
184	STIH416_DAC_NOT_PNDBG_MASK,
185	0);
186	if (!ret)
187	ret = snd_soc_update_bits(codec,
188	STIH416_AUDIO_DAC_CTRL,
189	STIH416_DAC_SOFTMUTE_MASK,
190	STIH416_DAC_SOFTMUTE_MASK);
191	break;
192	default:
193	return -EINVAL;
194	}
195
196	if (ret < 0) {
197	dev_err(codec->dev, "Failed to update DAC registers");
198	return ret;
199	}
200
201	return ret;
202	}
203
204	/*
205	* DAC
206	*/
207	static int sti_sas_dac_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
208	{
209	/* Sanity check only */
210	if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
211	dev_err(dai->codec->dev,
212	"%s: ERROR: Unsupporter master mask 0x%x\n",
213	__func__, fmt & SND_SOC_DAIFMT_MASTER_MASK);
214	return -EINVAL;
215	}
216
217	return 0;
218	}
219
220	static int stih416_dac_probe(struct snd_soc_dai *dai)
221	{
222	struct snd_soc_codec *codec = dai->codec;
223	struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
224	struct sti_dac_audio *dac = &drvdata->dac;
225
226	/* Get reset control */
227	dac->rst = devm_reset_control_get(codec->dev, "dac_rst");
228	if (IS_ERR(dac->rst)) {
229	dev_err(dai->codec->dev,
601b9d9c AP	230	"%s: ERROR: DAC reset control not defined !\n",
601b9d9c AP	231	__func__);
32a726b2 AP	232	dac->rst = NULL;
	233	return -EFAULT;
	234	}
	235	/* Put the DAC into reset */
	236	reset_control_assert(dac->rst);
	237
	238	return 0;
	239	}
	240
589bef32	241	static const struct snd_soc_dapm_widget stih416_sas_dapm_widgets[] = {
32a726b2 AP	242	SND_SOC_DAPM_PGA("DAC bandgap", STIH416_AUDIO_DAC_CTRL,
	243	STIH416_DAC_NOT_PNDBG_MASK, 0, NULL, 0),
	244	SND_SOC_DAPM_OUT_DRV("DAC standby ana", STIH416_AUDIO_DAC_CTRL,
	245	STIH416_DAC_ANA_NOT_PWR, 0, NULL, 0),
	246	SND_SOC_DAPM_DAC("DAC standby", "dac_p", STIH416_AUDIO_DAC_CTRL,
	247	STIH416_DAC_NOT_STANDBY, 0),
	248	SND_SOC_DAPM_OUTPUT("DAC Output"),
	249	};
	250
589bef32	251	static const struct snd_soc_dapm_widget stih407_sas_dapm_widgets[] = {
32a726b2 AP	252	SND_SOC_DAPM_OUT_DRV("DAC standby ana", STIH407_AUDIO_DAC_CTRL,
	253	STIH407_DAC_STANDBY_ANA, 1, NULL, 0),
	254	SND_SOC_DAPM_DAC("DAC standby", "dac_p", STIH407_AUDIO_DAC_CTRL,
	255	STIH407_DAC_STANDBY, 1),
	256	SND_SOC_DAPM_OUTPUT("DAC Output"),
	257	};
	258
589bef32	259	static const struct snd_soc_dapm_route stih416_sas_route[] = {
32a726b2 AP	260	{"DAC Output", NULL, "DAC bandgap"},
	261	{"DAC Output", NULL, "DAC standby ana"},
	262	{"DAC standby ana", NULL, "DAC standby"},
	263	};
	264
589bef32	265	static const struct snd_soc_dapm_route stih407_sas_route[] = {
32a726b2 AP	266	{"DAC Output", NULL, "DAC standby ana"},
	267	{"DAC standby ana", NULL, "DAC standby"},
	268	};
	269
	270	static int stih416_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream)
	271	{
	272	struct snd_soc_codec *codec = dai->codec;
	273
	274	if (mute) {
	275	return snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
	276	STIH416_DAC_SOFTMUTE_MASK,
	277	STIH416_DAC_SOFTMUTE_MASK);
	278	} else {
	279	return snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
	280	STIH416_DAC_SOFTMUTE_MASK, 0);
	281	}
	282	}
	283
	284	static int stih407_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream)
	285	{
	286	struct snd_soc_codec *codec = dai->codec;
	287
	288	if (mute) {
	289	return snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
	290	STIH407_DAC_SOFTMUTE_MASK,
	291	STIH407_DAC_SOFTMUTE_MASK);
	292	} else {
	293	return snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
	294	STIH407_DAC_SOFTMUTE_MASK,
	295	0);
	296	}
	297	}
	298
	299	/*
	300	* SPDIF
	301	*/
	302	static int sti_sas_spdif_set_fmt(struct snd_soc_dai *dai,
	303	unsigned int fmt)
	304	{
	305	if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
	306	dev_err(dai->codec->dev,
	307	"%s: ERROR: Unsupporter master mask 0x%x\n",
	308	__func__, fmt & SND_SOC_DAIFMT_MASTER_MASK);
	309	return -EINVAL;
	310	}
	311
	312	return 0;
	313	}
	314
	315	/*
	316	* sti_sas_spdif_trigger:
	317	* Trigger function is used to ensure that BiPhase Formater is disabled
	318	* before CPU dai is stopped.
	319	* This is mandatory to avoid that BPF is stalled
	320	*/
	321	static int sti_sas_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
	322	struct snd_soc_dai *dai)
	323	{
	324	struct snd_soc_codec *codec = dai->codec;
	325
	326	switch (cmd) {
	327	case SNDRV_PCM_TRIGGER_START:
	328	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	329	return snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
330	SPDIF_BIPHASE_ENABLE_MASK,
331	SPDIF_BIPHASE_ENABLE_MASK);
332	case SNDRV_PCM_TRIGGER_RESUME:
333	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
334	case SNDRV_PCM_TRIGGER_STOP:
335	case SNDRV_PCM_TRIGGER_SUSPEND:
336	return snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
337	SPDIF_BIPHASE_ENABLE_MASK,
338	0);
339	default:
340	return -EINVAL;
341	}
342	}
343
344	static bool sti_sas_volatile_register(struct device *dev, unsigned int reg)
345	{
346	if (reg == STIH407_AUDIO_GLUE_CTRL)
347	return true;
348
349	return false;
350	}
351
352	/*
353	* CODEC DAIS
354	*/
355
356	/*
357	* sti_sas_set_sysclk:
358	* get MCLK input frequency to check that MCLK-FS ratio is coherent
359	*/
360	static int sti_sas_set_sysclk(struct snd_soc_dai *dai, int clk_id,
361	unsigned int freq, int dir)
362	{
363	struct snd_soc_codec *codec = dai->codec;
364	struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
365
366	if (dir == SND_SOC_CLOCK_OUT)
367	return 0;
368
369	if (clk_id != 0)
370	return -EINVAL;
371
372	switch (dai->id) {
373	case STI_SAS_DAI_SPDIF_OUT:
374	drvdata->spdif.mclk = freq;
375	break;
376
377	case STI_SAS_DAI_ANALOG_OUT:
378	drvdata->dac.mclk = freq;
379	break;
380	}
381
382	return 0;
383	}
384
385	static int sti_sas_prepare(struct snd_pcm_substream *substream,
386	struct snd_soc_dai *dai)
387	{
388	struct snd_soc_codec *codec = dai->codec;
389	struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
390	struct snd_pcm_runtime *runtime = substream->runtime;
391
392	switch (dai->id) {
393	case STI_SAS_DAI_SPDIF_OUT:
394	if ((drvdata->spdif.mclk / runtime->rate) != 128) {
395	dev_err(codec->dev, "unexpected mclk-fs ratio");
396	return -EINVAL;
397	}
398	break;
399	case STI_SAS_DAI_ANALOG_OUT:
400	if ((drvdata->dac.mclk / runtime->rate) != 256) {
401	dev_err(codec->dev, "unexpected mclk-fs ratio");
402	return -EINVAL;
403	}
404	break;
405	}
406
407	return 0;
408	}
409
589bef32	410	static const struct snd_soc_dai_ops stih416_dac_ops = {
32a726b2 AP	411	.set_fmt = sti_sas_dac_set_fmt,
	412	.mute_stream = stih416_sas_dac_mute,
	413	.prepare = sti_sas_prepare,
	414	.set_sysclk = sti_sas_set_sysclk,
	415	};
	416
589bef32	417	static const struct snd_soc_dai_ops stih407_dac_ops = {
32a726b2 AP	418	.set_fmt = sti_sas_dac_set_fmt,
	419	.mute_stream = stih407_sas_dac_mute,
	420	.prepare = sti_sas_prepare,
	421	.set_sysclk = sti_sas_set_sysclk,
	422	};
	423
589bef32	424	static const struct regmap_config stih407_sas_regmap = {
32a726b2 AP	425	.reg_bits = 32,
	426	.val_bits = 32,
	427
	428	.max_register = STIH407_AUDIO_DAC_CTRL,
	429	.reg_defaults = stih407_sas_reg_defaults,
	430	.num_reg_defaults = ARRAY_SIZE(stih407_sas_reg_defaults),
	431	.volatile_reg = sti_sas_volatile_register,
	432	.cache_type = REGCACHE_RBTREE,
	433	.reg_read = sti_sas_read_reg,
	434	.reg_write = sti_sas_write_reg,
	435	};
	436
589bef32	437	static const struct regmap_config stih416_sas_regmap = {
32a726b2 AP	438	.reg_bits = 32,
	439	.val_bits = 32,
	440
	441	.max_register = STIH416_AUDIO_DAC_CTRL,
	442	.reg_defaults = stih416_sas_reg_defaults,
	443	.num_reg_defaults = ARRAY_SIZE(stih416_sas_reg_defaults),
	444	.volatile_reg = sti_sas_volatile_register,
	445	.cache_type = REGCACHE_RBTREE,
	446	.reg_read = sti_sas_read_reg,
	447	.reg_write = sti_sas_write_reg,
	448	};
	449
589bef32	450	static const struct sti_sas_dev_data stih416_data = {
32a726b2 AP	451	.chipid = CHIPID_STIH416,
	452	.regmap = &stih416_sas_regmap,
	453	.dac_ops = &stih416_dac_ops,
	454	.dapm_widgets = stih416_sas_dapm_widgets,
	455	.num_dapm_widgets = ARRAY_SIZE(stih416_sas_dapm_widgets),
	456	.dapm_routes = stih416_sas_route,
	457	.num_dapm_routes = ARRAY_SIZE(stih416_sas_route),
	458	};
	459
589bef32	460	static const struct sti_sas_dev_data stih407_data = {
32a726b2 AP	461	.chipid = CHIPID_STIH407,
	462	.regmap = &stih407_sas_regmap,
	463	.dac_ops = &stih407_dac_ops,
	464	.dapm_widgets = stih407_sas_dapm_widgets,
	465	.num_dapm_widgets = ARRAY_SIZE(stih407_sas_dapm_widgets),
	466	.dapm_routes = stih407_sas_route,
	467	.num_dapm_routes = ARRAY_SIZE(stih407_sas_route),
	468	};
	469
	470	static struct snd_soc_dai_driver sti_sas_dai[] = {
	471	{
	472	.name = "sas-dai-spdif-out",
	473	.id = STI_SAS_DAI_SPDIF_OUT,
	474	.playback = {
	475	.stream_name = "spdif_p",
	476	.channels_min = 2,
	477	.channels_max = 2,
	478	.rates = SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \|
	479	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_64000 \|
	480	SNDRV_PCM_RATE_88200 \| SNDRV_PCM_RATE_96000 \|
	481	SNDRV_PCM_RATE_192000,
	482	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
	483	SNDRV_PCM_FMTBIT_S32_LE,
	484	},
	485	.ops = (struct snd_soc_dai_ops[]) {
	486	{
	487	.set_fmt = sti_sas_spdif_set_fmt,
	488	.trigger = sti_sas_spdif_trigger,
	489	.set_sysclk = sti_sas_set_sysclk,
	490	.prepare = sti_sas_prepare,
	491	}
	492	},
	493	},
	494	{
	495	.name = "sas-dai-dac",
	496	.id = STI_SAS_DAI_ANALOG_OUT,
	497	.playback = {
	498	.stream_name = "dac_p",
	499	.channels_min = 2,
	500	.channels_max = 2,
	501	.rates = SNDRV_PCM_RATE_8000_48000,
	502	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
	503	SNDRV_PCM_FMTBIT_S32_LE,
	504	},
	505	},
	506	};
	507
	508	#ifdef CONFIG_PM_SLEEP
	509	static int sti_sas_resume(struct snd_soc_codec *codec)
	510	{
	511	struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
	512
	513	return sti_sas_init_sas_registers(codec, drvdata);
	514	}
	515	#else
	516	#define sti_sas_resume NULL
	517	#endif
	518
	519	static int sti_sas_codec_probe(struct snd_soc_codec *codec)
	520	{
	521	struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
	522	int ret;
	523
	524	ret = sti_sas_init_sas_registers(codec, drvdata);
525
526	return ret;
527	}
528
529	static struct snd_soc_codec_driver sti_sas_driver = {
530	.probe = sti_sas_codec_probe,
531	.resume = sti_sas_resume,
532	};
533
534	static const struct of_device_id sti_sas_dev_match[] = {
535	{
536	.compatible = "st,stih416-sas-codec",
537	.data = &stih416_data,
538	},
539	{
540	.compatible = "st,stih407-sas-codec",
541	.data = &stih407_data,
542	},
543	{},
544	};
545
546	static int sti_sas_driver_probe(struct platform_device *pdev)
547	{
548	struct device_node *pnode = pdev->dev.of_node;
549	struct sti_sas_data *drvdata;
601b9d9c	550	const struct of_device_id *of_id;
32a726b2 AP	551
	552	/* Allocate device structure */
	553	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct sti_sas_data),
	554	GFP_KERNEL);
	555	if (!drvdata)
	556	return -ENOMEM;
	557
	558	/* Populate data structure depending on compatibility */
601b9d9c AP	559	of_id = of_match_node(sti_sas_dev_match, pnode);
601b9d9c AP	560	if (!of_id->data) {
32a726b2 AP	561	dev_err(&pdev->dev, "data associated to device is missing");
	562	return -EINVAL;
	563	}
	564
601b9d9c	565	drvdata->dev_data = (struct sti_sas_dev_data *)of_id->data;
32a726b2 AP	566
	567	/* Initialise device structure */
	568	drvdata->dev = &pdev->dev;
	569
	570	/* Request the DAC & SPDIF registers memory region */
	571	drvdata->dac.virt_regmap = devm_regmap_init(&pdev->dev, NULL, drvdata,
	572	drvdata->dev_data->regmap);
e27d9ee6	573	if (IS_ERR(drvdata->dac.virt_regmap)) {
32a726b2	574	dev_err(&pdev->dev, "audio registers not enabled\n");
e27d9ee6	575	return PTR_ERR(drvdata->dac.virt_regmap);
32a726b2 AP	576	}
	577
	578	/* Request the syscon region */
	579	drvdata->dac.regmap =
	580	syscon_regmap_lookup_by_phandle(pnode, "st,syscfg");
e27d9ee6	581	if (IS_ERR(drvdata->dac.regmap)) {
32a726b2	582	dev_err(&pdev->dev, "syscon registers not available\n");
e27d9ee6	583	return PTR_ERR(drvdata->dac.regmap);
32a726b2 AP	584	}
	585	drvdata->spdif.regmap = drvdata->dac.regmap;
	586
	587	/* Set DAC dai probe */
	588	if (drvdata->dev_data->chipid == CHIPID_STIH416)
	589	sti_sas_dai[STI_SAS_DAI_ANALOG_OUT].probe = stih416_dac_probe;
	590
	591	sti_sas_dai[STI_SAS_DAI_ANALOG_OUT].ops = drvdata->dev_data->dac_ops;
	592
	593	/* Set dapms*/
97bf5f33 KM	594	sti_sas_driver.component_driver.dapm_widgets = drvdata->dev_data->dapm_widgets;
97bf5f33 KM	595	sti_sas_driver.component_driver.num_dapm_widgets = drvdata->dev_data->num_dapm_widgets;
32a726b2	596
97bf5f33 KM	597	sti_sas_driver.component_driver.dapm_routes = drvdata->dev_data->dapm_routes;
97bf5f33 KM	598	sti_sas_driver.component_driver.num_dapm_routes = drvdata->dev_data->num_dapm_routes;
32a726b2 AP	599
	600	/* Store context */
	601	dev_set_drvdata(&pdev->dev, drvdata);
	602
	603	return snd_soc_register_codec(&pdev->dev, &sti_sas_driver,
	604	sti_sas_dai,
	605	ARRAY_SIZE(sti_sas_dai));
	606	}
	607
	608	static int sti_sas_driver_remove(struct platform_device *pdev)
	609	{
	610	snd_soc_unregister_codec(&pdev->dev);
	611
	612	return 0;
	613	}
	614
	615	static struct platform_driver sti_sas_platform_driver = {
	616	.driver = {
	617	.name = "sti-sas-codec",
32a726b2 AP	618	.of_match_table = sti_sas_dev_match,
	619	},
	620	.probe = sti_sas_driver_probe,
	621	.remove = sti_sas_driver_remove,
	622	};
	623
	624	module_platform_driver(sti_sas_platform_driver);
	625
	626	MODULE_DESCRIPTION("audio codec for STMicroelectronics sti platforms");
	627	MODULE_AUTHOR("Arnaud.pouliquen@st.com");
	628	MODULE_LICENSE("GPL v2");