[deliverable/linux.git] / sound / soc / atmel / atmel-classd.c

/* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver
 *
 * Copyright (C) 2015 Atmel
 *
 * Author: Songjun Wu <songjun.wu@atmel.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 or later
 * as published by the Free Software Foundation.
 */

#include <linux/of.h>
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>
#include "atmel-classd.h"

struct atmel_classd_pdata {
	bool non_overlap_enable;
	int non_overlap_time;
	int pwm_type;
	const char *card_name;
};

struct atmel_classd {
	dma_addr_t phy_base;
	struct regmap *regmap;
	struct clk *pclk;
	struct clk *gclk;
	struct clk *aclk;
	int irq;
	const struct atmel_classd_pdata *pdata;
};

#ifdef CONFIG_OF
static const struct of_device_id atmel_classd_of_match[] = {
	{
		.compatible = "atmel,sama5d2-classd",
	}, {
		/* sentinel */
	}
};
MODULE_DEVICE_TABLE(of, atmel_classd_of_match);

static struct atmel_classd_pdata *atmel_classd_dt_init(struct device *dev)
{
	struct device_node *np = dev->of_node;
	struct atmel_classd_pdata *pdata;
	const char *pwm_type;
	int ret;

	if (!np) {
		dev_err(dev, "device node not found\n");
		return ERR_PTR(-EINVAL);
	}

	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return ERR_PTR(-ENOMEM);

	ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type);
	if ((ret == 0) && (strcmp(pwm_type, "diff") == 0))
		pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF;
	else
		pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE;

	ret = of_property_read_u32(np,
			"atmel,non-overlap-time", &pdata->non_overlap_time);
	if (ret)
		pdata->non_overlap_enable = false;
	else
		pdata->non_overlap_enable = true;

	ret = of_property_read_string(np, "atmel,model", &pdata->card_name);
	if (ret)
		pdata->card_name = "CLASSD";

	return pdata;
}
#else
static inline struct atmel_classd_pdata *
atmel_classd_dt_init(struct device *dev)
{
	return ERR_PTR(-EINVAL);
}
#endif

#define ATMEL_CLASSD_RATES (SNDRV_PCM_RATE_8000 \
			| SNDRV_PCM_RATE_16000	| SNDRV_PCM_RATE_22050 \
			| SNDRV_PCM_RATE_32000	| SNDRV_PCM_RATE_44100 \
			| SNDRV_PCM_RATE_48000	| SNDRV_PCM_RATE_88200 \
			| SNDRV_PCM_RATE_96000)

static const struct snd_pcm_hardware atmel_classd_hw = {
	.info			= SNDRV_PCM_INFO_MMAP
				| SNDRV_PCM_INFO_MMAP_VALID
				| SNDRV_PCM_INFO_INTERLEAVED
				| SNDRV_PCM_INFO_RESUME
				| SNDRV_PCM_INFO_PAUSE,
	.formats		= (SNDRV_PCM_FMTBIT_S16_LE),
	.rates			= ATMEL_CLASSD_RATES,
	.rate_min		= 8000,
	.rate_max		= 96000,
	.channels_min		= 2,
	.channels_max		= 2,
	.buffer_bytes_max	= 64 * 1024,
	.period_bytes_min	= 256,
	.period_bytes_max	= 32 * 1024,
	.periods_min		= 2,
	.periods_max		= 256,
};

#define ATMEL_CLASSD_PREALLOC_BUF_SIZE  (64 * 1024)

/* cpu dai component */
static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream,
					struct snd_soc_dai *cpu_dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);

	regmap_write(dd->regmap, CLASSD_THR, 0x0);

	return clk_prepare_enable(dd->pclk);
}

static void atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream,
					struct snd_soc_dai *cpu_dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);

	clk_disable_unprepare(dd->pclk);
}

static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = {
	.startup	= atmel_classd_cpu_dai_startup,
	.shutdown	= atmel_classd_cpu_dai_shutdown,
};

static struct snd_soc_dai_driver atmel_classd_cpu_dai = {
	.playback = {
		.channels_min	= 2,
		.channels_max	= 2,
		.rates		= ATMEL_CLASSD_RATES,
		.formats	= SNDRV_PCM_FMTBIT_S16_LE,},
	.ops = &atmel_classd_cpu_dai_ops,
};

static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = {
	.name = "atmel-classd",
};

/* platform */
static int
atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct dma_slave_config *slave_config)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);

	if (params_physical_width(params) != 16) {
		dev_err(rtd->platform->dev,
			"only supports 16-bit audio data\n");
		return -EINVAL;
	}

	slave_config->direction		= DMA_MEM_TO_DEV;
	slave_config->dst_addr		= dd->phy_base + CLASSD_THR;
	slave_config->dst_addr_width	= DMA_SLAVE_BUSWIDTH_4_BYTES;
	slave_config->dst_maxburst	= 1;
	slave_config->src_maxburst	= 1;
	slave_config->device_fc		= false;

	return 0;
}

static const struct snd_dmaengine_pcm_config
atmel_classd_dmaengine_pcm_config = {
	.prepare_slave_config	= atmel_classd_platform_configure_dma,
	.pcm_hardware		= &atmel_classd_hw,
	.prealloc_buffer_size	= ATMEL_CLASSD_PREALLOC_BUF_SIZE,
};

/* codec */
static const char * const mono_mode_text[] = {
	"mix", "sat", "left", "right"
};

static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum,
			CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT,
			mono_mode_text);

static const char * const eqcfg_text[] = {
	"Treble-12dB", "Treble-6dB",
	"Medium-8dB", "Medium-3dB",
	"Bass-12dB", "Bass-6dB",
	"0 dB",
	"Bass+6dB", "Bass+12dB",
	"Medium+3dB", "Medium+8dB",
	"Treble+6dB", "Treble+12dB",
};

static const unsigned int eqcfg_value[] = {
	CLASSD_INTPMR_EQCFG_T_CUT_12, CLASSD_INTPMR_EQCFG_T_CUT_6,
	CLASSD_INTPMR_EQCFG_M_CUT_8, CLASSD_INTPMR_EQCFG_M_CUT_3,
	CLASSD_INTPMR_EQCFG_B_CUT_12, CLASSD_INTPMR_EQCFG_B_CUT_6,
	CLASSD_INTPMR_EQCFG_FLAT,
	CLASSD_INTPMR_EQCFG_B_BOOST_6, CLASSD_INTPMR_EQCFG_B_BOOST_12,
	CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8,
	CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12,
};

static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum,
		CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf,
		eqcfg_text, eqcfg_value);

static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1);

static const struct snd_kcontrol_new atmel_classd_snd_controls[] = {
SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR,
		CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT,
		78, 1, classd_digital_tlv),

SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR,
		CLASSD_INTPMR_DEEMP_SHIFT, 1, 0),

SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0),

SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0),

SOC_ENUM("Mono Mode", classd_mono_mode_enum),

SOC_ENUM("EQ", classd_eqcfg_enum),
};

static const char * const pwm_type[] = {
	"Single ended", "Differential"
};

static int atmel_classd_codec_probe(struct snd_soc_codec *codec)
{
	struct snd_soc_card *card = snd_soc_codec_get_drvdata(codec);
	struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
	const struct atmel_classd_pdata *pdata = dd->pdata;
	u32 mask, val;

	mask = CLASSD_MR_PWMTYP_MASK;
	val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT;

	mask |= CLASSD_MR_NON_OVERLAP_MASK;
	if (pdata->non_overlap_enable) {
		val |= (CLASSD_MR_NON_OVERLAP_EN
			<< CLASSD_MR_NON_OVERLAP_SHIFT);

		mask |= CLASSD_MR_NOVR_VAL_MASK;
		switch (pdata->non_overlap_time) {
		case 5:
			val |= (CLASSD_MR_NOVR_VAL_5NS
				<< CLASSD_MR_NOVR_VAL_SHIFT);
			break;
		case 10:
			val |= (CLASSD_MR_NOVR_VAL_10NS
				<< CLASSD_MR_NOVR_VAL_SHIFT);
			break;
		case 15:
			val |= (CLASSD_MR_NOVR_VAL_15NS
				<< CLASSD_MR_NOVR_VAL_SHIFT);
			break;
		case 20:
			val |= (CLASSD_MR_NOVR_VAL_20NS
				<< CLASSD_MR_NOVR_VAL_SHIFT);
			break;
		default:
			val |= (CLASSD_MR_NOVR_VAL_10NS
				<< CLASSD_MR_NOVR_VAL_SHIFT);
			dev_warn(codec->dev,
				"non-overlapping value %d is invalid, the default value 10 is specified\n",
				pdata->non_overlap_time);
			break;
		}
	}

	snd_soc_update_bits(codec, CLASSD_MR, mask, val);

	dev_info(codec->dev,
		"PWM modulation type is %s, non-overlapping is %s\n",
		pwm_type[pdata->pwm_type],
		pdata->non_overlap_enable?"enabled":"disabled");

	return 0;
}

static struct regmap *atmel_classd_codec_get_remap(struct device *dev)
{
	return dev_get_regmap(dev, NULL);
}

static struct snd_soc_codec_driver soc_codec_dev_classd = {
	.probe		= atmel_classd_codec_probe,
	.controls	= atmel_classd_snd_controls,
	.num_controls	= ARRAY_SIZE(atmel_classd_snd_controls),
	.get_regmap	= atmel_classd_codec_get_remap,
};

/* codec dai component */
static int atmel_classd_codec_dai_startup(struct snd_pcm_substream *substream,
				struct snd_soc_dai *codec_dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
	int ret;

	ret = clk_prepare_enable(dd->aclk);
	if (ret)
		return ret;

	return clk_prepare_enable(dd->gclk);
}

static int atmel_classd_codec_dai_digital_mute(struct snd_soc_dai *codec_dai,
	int mute)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u32 mask, val;

	mask = CLASSD_MR_LMUTE_MASK | CLASSD_MR_RMUTE_MASK;

	if (mute)
		val = mask;
	else
		val = 0;

	snd_soc_update_bits(codec, CLASSD_MR, mask, val);

	return 0;
}

#define CLASSD_ACLK_RATE_11M2896_MPY_8 (112896 * 100 * 8)
#define CLASSD_ACLK_RATE_12M288_MPY_8  (12228 * 1000 * 8)

static struct {
	int rate;
	int sample_rate;
	int dsp_clk;
	unsigned long aclk_rate;
} const sample_rates[] = {
	{ 8000,  CLASSD_INTPMR_FRAME_8K,
	CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
	{ 16000, CLASSD_INTPMR_FRAME_16K,
	CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
	{ 32000, CLASSD_INTPMR_FRAME_32K,
	CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
	{ 48000, CLASSD_INTPMR_FRAME_48K,
	CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
	{ 96000, CLASSD_INTPMR_FRAME_96K,
	CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
	{ 22050, CLASSD_INTPMR_FRAME_22K,
	CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
	{ 44100, CLASSD_INTPMR_FRAME_44K,
	CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
	{ 88200, CLASSD_INTPMR_FRAME_88K,
	CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
};

static int
atmel_classd_codec_dai_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *codec_dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
	struct snd_soc_codec *codec = codec_dai->codec;
	int fs;
	int i, best, best_val, cur_val, ret;
	u32 mask, val;

	fs = params_rate(params);

	best = 0;
	best_val = abs(fs - sample_rates[0].rate);
	for (i = 1; i < ARRAY_SIZE(sample_rates); i++) {
		/* Closest match */
		cur_val = abs(fs - sample_rates[i].rate);
		if (cur_val < best_val) {
			best = i;
			best_val = cur_val;
		}
	}

	dev_dbg(codec->dev,
		"Selected SAMPLE_RATE of %dHz, ACLK_RATE of %ldHz\n",
		sample_rates[best].rate, sample_rates[best].aclk_rate);

	clk_disable_unprepare(dd->gclk);
	clk_disable_unprepare(dd->aclk);

	ret = clk_set_rate(dd->aclk, sample_rates[best].aclk_rate);
	if (ret)
		return ret;

	mask = CLASSD_INTPMR_DSP_CLK_FREQ_MASK | CLASSD_INTPMR_FRAME_MASK;
	val = (sample_rates[best].dsp_clk << CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT)
	| (sample_rates[best].sample_rate << CLASSD_INTPMR_FRAME_SHIFT);

	snd_soc_update_bits(codec, CLASSD_INTPMR, mask, val);

	ret = clk_prepare_enable(dd->aclk);
	if (ret)
		return ret;

	return clk_prepare_enable(dd->gclk);
}

static void
atmel_classd_codec_dai_shutdown(struct snd_pcm_substream *substream,
			    struct snd_soc_dai *codec_dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);

	clk_disable_unprepare(dd->gclk);
	clk_disable_unprepare(dd->aclk);
}

static int atmel_classd_codec_dai_prepare(struct snd_pcm_substream *substream,
					struct snd_soc_dai *codec_dai)
{
	struct snd_soc_codec *codec = codec_dai->codec;

	snd_soc_update_bits(codec, CLASSD_MR,
				CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK,
				(CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
				|(CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT));

	return 0;
}

static int atmel_classd_codec_dai_trigger(struct snd_pcm_substream *substream,
					int cmd, struct snd_soc_dai *codec_dai)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u32 mask, val;

	mask = CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		val = mask;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		val = (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
			| (CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT);
		break;
	default:
		return -EINVAL;
	}

	snd_soc_update_bits(codec, CLASSD_MR, mask, val);

	return 0;
}

static const struct snd_soc_dai_ops atmel_classd_codec_dai_ops = {
	.digital_mute	= atmel_classd_codec_dai_digital_mute,
	.startup	= atmel_classd_codec_dai_startup,
	.shutdown	= atmel_classd_codec_dai_shutdown,
	.hw_params	= atmel_classd_codec_dai_hw_params,
	.prepare	= atmel_classd_codec_dai_prepare,
	.trigger	= atmel_classd_codec_dai_trigger,
};

#define ATMEL_CLASSD_CODEC_DAI_NAME  "atmel-classd-hifi"

static struct snd_soc_dai_driver atmel_classd_codec_dai = {
	.name = ATMEL_CLASSD_CODEC_DAI_NAME,
	.playback = {
		.stream_name	= "Playback",
		.channels_min	= 2,
		.channels_max	= 2,
		.rates		= ATMEL_CLASSD_RATES,
		.formats	= SNDRV_PCM_FMTBIT_S16_LE,
	},
	.ops = &atmel_classd_codec_dai_ops,
};

/* ASoC sound card */
static int atmel_classd_asoc_card_init(struct device *dev,
					struct snd_soc_card *card)
{
	struct snd_soc_dai_link *dai_link;
	struct atmel_classd *dd = snd_soc_card_get_drvdata(card);

	dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL);
	if (!dai_link)
		return -ENOMEM;

	dai_link->name			= "CLASSD";
	dai_link->stream_name		= "CLASSD PCM";
	dai_link->codec_dai_name	= ATMEL_CLASSD_CODEC_DAI_NAME;
	dai_link->cpu_dai_name		= dev_name(dev);
	dai_link->codec_name		= dev_name(dev);
	dai_link->platform_name		= dev_name(dev);

	card->dai_link	= dai_link;
	card->num_links	= 1;
	card->name	= dd->pdata->card_name;
	card->dev	= dev;

	return 0;
};

/* regmap configuration */
static const struct reg_default atmel_classd_reg_defaults[] = {
	{ CLASSD_INTPMR,   0x00301212 },
};

#define ATMEL_CLASSD_REG_MAX    0xE4
static const struct regmap_config atmel_classd_regmap_config = {
	.reg_bits	= 32,
	.reg_stride	= 4,
	.val_bits	= 32,
	.max_register	= ATMEL_CLASSD_REG_MAX,

	.cache_type		= REGCACHE_FLAT,
	.reg_defaults		= atmel_classd_reg_defaults,
	.num_reg_defaults	= ARRAY_SIZE(atmel_classd_reg_defaults),
};

static int atmel_classd_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct atmel_classd *dd;
	struct resource *res;
	void __iomem *io_base;
	const struct atmel_classd_pdata *pdata;
	struct snd_soc_card *card;
	int ret;

	pdata = dev_get_platdata(dev);
	if (!pdata) {
		pdata = atmel_classd_dt_init(dev);
		if (IS_ERR(pdata))
			return PTR_ERR(pdata);
	}

	dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL);
	if (!dd)
		return -ENOMEM;

	dd->pdata = pdata;

	dd->irq = platform_get_irq(pdev, 0);
	if (dd->irq < 0) {
		ret = dd->irq;
		dev_err(dev, "failed to could not get irq: %d\n", ret);
		return ret;
	}

	dd->pclk = devm_clk_get(dev, "pclk");
	if (IS_ERR(dd->pclk)) {
		ret = PTR_ERR(dd->pclk);
		dev_err(dev, "failed to get peripheral clock: %d\n", ret);
		return ret;
	}

	dd->gclk = devm_clk_get(dev, "gclk");
	if (IS_ERR(dd->gclk)) {
		ret = PTR_ERR(dd->gclk);
		dev_err(dev, "failed to get GCK clock: %d\n", ret);
		return ret;
	}

	dd->aclk = devm_clk_get(dev, "aclk");
	if (IS_ERR(dd->aclk)) {
		ret = PTR_ERR(dd->aclk);
		dev_err(dev, "failed to get audio clock: %d\n", ret);
		return ret;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(dev, "no memory resource\n");
		return -ENXIO;
	}

	io_base = devm_ioremap_resource(dev, res);
	if (IS_ERR(io_base)) {
		ret =  PTR_ERR(io_base);
		dev_err(dev, "failed to remap register memory: %d\n", ret);
		return ret;
	}

	dd->phy_base = res->start;

	dd->regmap = devm_regmap_init_mmio(dev, io_base,
					&atmel_classd_regmap_config);
	if (IS_ERR(dd->regmap)) {
		ret = PTR_ERR(dd->regmap);
		dev_err(dev, "failed to init register map: %d\n", ret);
		return ret;
	}

	ret = devm_snd_soc_register_component(dev,
					&atmel_classd_cpu_dai_component,
					&atmel_classd_cpu_dai, 1);
	if (ret) {
		dev_err(dev, "could not register CPU DAI: %d\n", ret);
		return ret;
	}

	ret = devm_snd_dmaengine_pcm_register(dev,
					&atmel_classd_dmaengine_pcm_config,
					0);
	if (ret) {
		dev_err(dev, "could not register platform: %d\n", ret);
		return ret;
	}

	ret = snd_soc_register_codec(dev, &soc_codec_dev_classd,
					&atmel_classd_codec_dai, 1);
	if (ret) {
		dev_err(dev, "could not register codec: %d\n", ret);
		return ret;
	}

	/* register sound card */
	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
	if (!card)
		return -ENOMEM;

	snd_soc_card_set_drvdata(card, dd);
	platform_set_drvdata(pdev, card);

	ret = atmel_classd_asoc_card_init(dev, card);
	if (ret) {
		dev_err(dev, "failed to init sound card\n");
		return ret;
	}

	ret = devm_snd_soc_register_card(dev, card);
	if (ret) {
		dev_err(dev, "failed to register sound card: %d\n", ret);
		return ret;
	}

	return 0;
}

static int atmel_classd_remove(struct platform_device *pdev)
{
	snd_soc_unregister_codec(&pdev->dev);
	return 0;
}

static struct platform_driver atmel_classd_driver = {
	.driver	= {
		.name		= "atmel-classd",
		.of_match_table	= of_match_ptr(atmel_classd_of_match),
		.pm		= &snd_soc_pm_ops,
	},
	.probe	= atmel_classd_probe,
	.remove	= atmel_classd_remove,
};
module_platform_driver(atmel_classd_driver);

MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture");
MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
e0a25b6d SW	1	/* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver
	2	*
	3	* Copyright (C) 2015 Atmel
	4	*
	5	* Author: Songjun Wu <songjun.wu@atmel.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 or later
	9	* as published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/of.h>
	13	#include <linux/clk.h>
	14	#include <linux/module.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/regmap.h>
	17	#include <sound/core.h>
	18	#include <sound/dmaengine_pcm.h>
	19	#include <sound/pcm_params.h>
	20	#include <sound/tlv.h>
	21	#include "atmel-classd.h"
	22
	23	struct atmel_classd_pdata {
	24	bool non_overlap_enable;
	25	int non_overlap_time;
	26	int pwm_type;
	27	const char *card_name;
	28	};
	29
	30	struct atmel_classd {
	31	dma_addr_t phy_base;
	32	struct regmap *regmap;
	33	struct clk *pclk;
	34	struct clk *gclk;
	35	struct clk *aclk;
	36	int irq;
	37	const struct atmel_classd_pdata *pdata;
	38	};
	39
	40	#ifdef CONFIG_OF
	41	static const struct of_device_id atmel_classd_of_match[] = {
	42	{
	43	.compatible = "atmel,sama5d2-classd",
	44	}, {
	45	/* sentinel */
	46	}
	47	};
	48	MODULE_DEVICE_TABLE(of, atmel_classd_of_match);
	49
	50	static struct atmel_classd_pdata atmel_classd_dt_init(struct device dev)
	51	{
	52	struct device_node *np = dev->of_node;
	53	struct atmel_classd_pdata *pdata;
	54	const char *pwm_type;
	55	int ret;
	56
	57	if (!np) {
	58	dev_err(dev, "device node not found\n");
	59	return ERR_PTR(-EINVAL);
	60	}
	61
	62	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	63	if (!pdata)
	64	return ERR_PTR(-ENOMEM);
65
66	ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type);
67	if ((ret == 0) && (strcmp(pwm_type, "diff") == 0))
68	pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF;
69	else
70	pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE;
71
72	ret = of_property_read_u32(np,
73	"atmel,non-overlap-time", &pdata->non_overlap_time);
74	if (ret)
75	pdata->non_overlap_enable = false;
76	else
77	pdata->non_overlap_enable = true;
78
79	ret = of_property_read_string(np, "atmel,model", &pdata->card_name);
80	if (ret)
81	pdata->card_name = "CLASSD";
82
83	return pdata;
84	}
85	#else
86	static inline struct atmel_classd_pdata *
87	atmel_classd_dt_init(struct device *dev)
88	{
89	return ERR_PTR(-EINVAL);
90	}
91	#endif
92
93	#define ATMEL_CLASSD_RATES (SNDRV_PCM_RATE_8000 \
94	\| SNDRV_PCM_RATE_16000 \| SNDRV_PCM_RATE_22050 \
95	\| SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \
96	\| SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \
97	\| SNDRV_PCM_RATE_96000)
98
99	static const struct snd_pcm_hardware atmel_classd_hw = {
100	.info = SNDRV_PCM_INFO_MMAP
101	\| SNDRV_PCM_INFO_MMAP_VALID
102	\| SNDRV_PCM_INFO_INTERLEAVED
103	\| SNDRV_PCM_INFO_RESUME
104	\| SNDRV_PCM_INFO_PAUSE,
105	.formats = (SNDRV_PCM_FMTBIT_S16_LE),
106	.rates = ATMEL_CLASSD_RATES,
107	.rate_min = 8000,
108	.rate_max = 96000,
109	.channels_min = 2,
110	.channels_max = 2,
111	.buffer_bytes_max = 64 * 1024,
112	.period_bytes_min = 256,
113	.period_bytes_max = 32 * 1024,
114	.periods_min = 2,
115	.periods_max = 256,
116	};
117
118	#define ATMEL_CLASSD_PREALLOC_BUF_SIZE (64 * 1024)
119
120	/* cpu dai component */
121	static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream,
122	struct snd_soc_dai *cpu_dai)
123	{
124	struct snd_soc_pcm_runtime *rtd = substream->private_data;
125	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
126
127	regmap_write(dd->regmap, CLASSD_THR, 0x0);
128
129	return clk_prepare_enable(dd->pclk);
130	}
131
132	static void atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream,
133	struct snd_soc_dai *cpu_dai)
134	{
135	struct snd_soc_pcm_runtime *rtd = substream->private_data;
136	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
137
138	clk_disable_unprepare(dd->pclk);
139	}
140
141	static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = {
142	.startup = atmel_classd_cpu_dai_startup,
143	.shutdown = atmel_classd_cpu_dai_shutdown,
144	};
145
146	static struct snd_soc_dai_driver atmel_classd_cpu_dai = {
147	.playback = {
148	.channels_min = 2,
149	.channels_max = 2,
150	.rates = ATMEL_CLASSD_RATES,
151	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
152	.ops = &atmel_classd_cpu_dai_ops,
153	};
154
155	static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = {
156	.name = "atmel-classd",
157	};
158
159	/* platform */
160	static int
161	atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream,
162	struct snd_pcm_hw_params *params,
163	struct dma_slave_config *slave_config)
164	{
165	struct snd_soc_pcm_runtime *rtd = substream->private_data;
166	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
167
168	if (params_physical_width(params) != 16) {
169	dev_err(rtd->platform->dev,
170	"only supports 16-bit audio data\n");
171	return -EINVAL;
172	}
173
174	slave_config->direction = DMA_MEM_TO_DEV;
175	slave_config->dst_addr = dd->phy_base + CLASSD_THR;
176	slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
177	slave_config->dst_maxburst = 1;
178	slave_config->src_maxburst = 1;
179	slave_config->device_fc = false;
180
181	return 0;
182	}
183
184	static const struct snd_dmaengine_pcm_config
185	atmel_classd_dmaengine_pcm_config = {
186	.prepare_slave_config = atmel_classd_platform_configure_dma,
187	.pcm_hardware = &atmel_classd_hw,
188	.prealloc_buffer_size = ATMEL_CLASSD_PREALLOC_BUF_SIZE,
189	};
190
191	/* codec */
192	static const char * const mono_mode_text[] = {
193	"mix", "sat", "left", "right"
194	};
195
196	static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum,
197	CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT,
198	mono_mode_text);
199
200	static const char * const eqcfg_text[] = {
201	"Treble-12dB", "Treble-6dB",
202	"Medium-8dB", "Medium-3dB",
203	"Bass-12dB", "Bass-6dB",
204	"0 dB",
205	"Bass+6dB", "Bass+12dB",
206	"Medium+3dB", "Medium+8dB",
207	"Treble+6dB", "Treble+12dB",
208	};
209
210	static const unsigned int eqcfg_value[] = {
211	CLASSD_INTPMR_EQCFG_T_CUT_12, CLASSD_INTPMR_EQCFG_T_CUT_6,
212	CLASSD_INTPMR_EQCFG_M_CUT_8, CLASSD_INTPMR_EQCFG_M_CUT_3,
213	CLASSD_INTPMR_EQCFG_B_CUT_12, CLASSD_INTPMR_EQCFG_B_CUT_6,
214	CLASSD_INTPMR_EQCFG_FLAT,
215	CLASSD_INTPMR_EQCFG_B_BOOST_6, CLASSD_INTPMR_EQCFG_B_BOOST_12,
216	CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8,
217	CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12,
218	};
219
220	static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum,
221	CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf,
222	eqcfg_text, eqcfg_value);
223
224	static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1);
225
226	static const struct snd_kcontrol_new atmel_classd_snd_controls[] = {
227	SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR,
228	CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT,
229	78, 1, classd_digital_tlv),
230
231	SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR,
232	CLASSD_INTPMR_DEEMP_SHIFT, 1, 0),
233
234	SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0),
235
236	SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0),
237
238	SOC_ENUM("Mono Mode", classd_mono_mode_enum),
239
240	SOC_ENUM("EQ", classd_eqcfg_enum),
241	};
242
243	static const char * const pwm_type[] = {
244	"Single ended", "Differential"
245	};
246
247	static int atmel_classd_codec_probe(struct snd_soc_codec *codec)
248	{
249	struct snd_soc_card *card = snd_soc_codec_get_drvdata(codec);
250	struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
251	const struct atmel_classd_pdata *pdata = dd->pdata;
252	u32 mask, val;
253
254	mask = CLASSD_MR_PWMTYP_MASK;
255	val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT;
256
257	mask \|= CLASSD_MR_NON_OVERLAP_MASK;
258	if (pdata->non_overlap_enable) {
259	val \|= (CLASSD_MR_NON_OVERLAP_EN
260	<< CLASSD_MR_NON_OVERLAP_SHIFT);
261
262	mask \|= CLASSD_MR_NOVR_VAL_MASK;
263	switch (pdata->non_overlap_time) {
264	case 5:
265	val \|= (CLASSD_MR_NOVR_VAL_5NS
266	<< CLASSD_MR_NOVR_VAL_SHIFT);
267	break;
268	case 10:
269	val \|= (CLASSD_MR_NOVR_VAL_10NS
270	<< CLASSD_MR_NOVR_VAL_SHIFT);
271	break;
272	case 15:
273	val \|= (CLASSD_MR_NOVR_VAL_15NS
274	<< CLASSD_MR_NOVR_VAL_SHIFT);
275	break;
276	case 20:
277	val \|= (CLASSD_MR_NOVR_VAL_20NS
278	<< CLASSD_MR_NOVR_VAL_SHIFT);
279	break;
280	default:
281	val \|= (CLASSD_MR_NOVR_VAL_10NS
282	<< CLASSD_MR_NOVR_VAL_SHIFT);
283	dev_warn(codec->dev,
284	"non-overlapping value %d is invalid, the default value 10 is specified\n",
285	pdata->non_overlap_time);
286	break;
287	}
288	}
289
290	snd_soc_update_bits(codec, CLASSD_MR, mask, val);
291
292	dev_info(codec->dev,
293	"PWM modulation type is %s, non-overlapping is %s\n",
294	pwm_type[pdata->pwm_type],
295	pdata->non_overlap_enable?"enabled":"disabled");
296
297	return 0;
298	}
299
300	static struct regmap atmel_classd_codec_get_remap(struct device dev)
301	{
302	return dev_get_regmap(dev, NULL);
303	}
304
305	static struct snd_soc_codec_driver soc_codec_dev_classd = {
306	.probe = atmel_classd_codec_probe,
307	.controls = atmel_classd_snd_controls,
308	.num_controls = ARRAY_SIZE(atmel_classd_snd_controls),
309	.get_regmap = atmel_classd_codec_get_remap,
310	};
311
312	/* codec dai component */
313	static int atmel_classd_codec_dai_startup(struct snd_pcm_substream *substream,
314	struct snd_soc_dai *codec_dai)
315	{
316	struct snd_soc_pcm_runtime *rtd = substream->private_data;
317	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
318	int ret;
319
320	ret = clk_prepare_enable(dd->aclk);
321	if (ret)
322	return ret;
323
324	return clk_prepare_enable(dd->gclk);
325	}
326
327	static int atmel_classd_codec_dai_digital_mute(struct snd_soc_dai *codec_dai,
328	int mute)
329	{
330	struct snd_soc_codec *codec = codec_dai->codec;
331	u32 mask, val;
332
333	mask = CLASSD_MR_LMUTE_MASK \| CLASSD_MR_RMUTE_MASK;
334
335	if (mute)
336	val = mask;
337	else
338	val = 0;
339
340	snd_soc_update_bits(codec, CLASSD_MR, mask, val);
341
342	return 0;
343	}
344
345	#define CLASSD_ACLK_RATE_11M2896_MPY_8 (112896 * 100 * 8)
346	#define CLASSD_ACLK_RATE_12M288_MPY_8 (12228 * 1000 * 8)
347
348	static struct {
349	int rate;
350	int sample_rate;
351	int dsp_clk;
352	unsigned long aclk_rate;
353	} const sample_rates[] = {
354	{ 8000, CLASSD_INTPMR_FRAME_8K,
355	CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
356	{ 16000, CLASSD_INTPMR_FRAME_16K,
357	CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
358	{ 32000, CLASSD_INTPMR_FRAME_32K,
359	CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
360	{ 48000, CLASSD_INTPMR_FRAME_48K,
361	CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
362	{ 96000, CLASSD_INTPMR_FRAME_96K,
363	CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
364	{ 22050, CLASSD_INTPMR_FRAME_22K,
365	CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
366	{ 44100, CLASSD_INTPMR_FRAME_44K,
367	CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
368	{ 88200, CLASSD_INTPMR_FRAME_88K,
369	CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
370	};
371
372	static int
373	atmel_classd_codec_dai_hw_params(struct snd_pcm_substream *substream,
374	struct snd_pcm_hw_params *params,
375	struct snd_soc_dai *codec_dai)
376	{
377	struct snd_soc_pcm_runtime *rtd = substream->private_data;
378	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
379	struct snd_soc_codec *codec = codec_dai->codec;
380	int fs;
381	int i, best, best_val, cur_val, ret;
382	u32 mask, val;
383
384	fs = params_rate(params);
385
386	best = 0;
387	best_val = abs(fs - sample_rates[0].rate);
388	for (i = 1; i < ARRAY_SIZE(sample_rates); i++) {
389	/* Closest match */
390	cur_val = abs(fs - sample_rates[i].rate);
391	if (cur_val < best_val) {
392	best = i;
393	best_val = cur_val;
394	}
395	}
396
397	dev_dbg(codec->dev,
398	"Selected SAMPLE_RATE of %dHz, ACLK_RATE of %ldHz\n",
399	sample_rates[best].rate, sample_rates[best].aclk_rate);
400
401	clk_disable_unprepare(dd->gclk);
402	clk_disable_unprepare(dd->aclk);
403
404	ret = clk_set_rate(dd->aclk, sample_rates[best].aclk_rate);
405	if (ret)
406	return ret;
407
408	mask = CLASSD_INTPMR_DSP_CLK_FREQ_MASK \| CLASSD_INTPMR_FRAME_MASK;
409	val = (sample_rates[best].dsp_clk << CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT)
410	\| (sample_rates[best].sample_rate << CLASSD_INTPMR_FRAME_SHIFT);
411
412	snd_soc_update_bits(codec, CLASSD_INTPMR, mask, val);
413
414	ret = clk_prepare_enable(dd->aclk);
415	if (ret)
416	return ret;
417
418	return clk_prepare_enable(dd->gclk);
419	}
420
421	static void
422	atmel_classd_codec_dai_shutdown(struct snd_pcm_substream *substream,
423	struct snd_soc_dai *codec_dai)
424	{
425	struct snd_soc_pcm_runtime *rtd = substream->private_data;
426	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
427
428	clk_disable_unprepare(dd->gclk);
429	clk_disable_unprepare(dd->aclk);
430	}
431
432	static int atmel_classd_codec_dai_prepare(struct snd_pcm_substream *substream,
433	struct snd_soc_dai *codec_dai)
434	{
435	struct snd_soc_codec *codec = codec_dai->codec;
436
437	snd_soc_update_bits(codec, CLASSD_MR,
438	CLASSD_MR_LEN_MASK \| CLASSD_MR_REN_MASK,
439	(CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
440	\|(CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT));
441
442	return 0;
443	}
444
445	static int atmel_classd_codec_dai_trigger(struct snd_pcm_substream *substream,
446	int cmd, struct snd_soc_dai *codec_dai)
447	{
448	struct snd_soc_codec *codec = codec_dai->codec;
449	u32 mask, val;
450
451	mask = CLASSD_MR_LEN_MASK \| CLASSD_MR_REN_MASK;
452
453	switch (cmd) {
454	case SNDRV_PCM_TRIGGER_START:
455	case SNDRV_PCM_TRIGGER_RESUME:
456	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
457	val = mask;
458	break;
459	case SNDRV_PCM_TRIGGER_STOP:
460	case SNDRV_PCM_TRIGGER_SUSPEND:
461	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
462	val = (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
463	\| (CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT);
464	break;
465	default:
466	return -EINVAL;
467	}
468
469	snd_soc_update_bits(codec, CLASSD_MR, mask, val);
470
471	return 0;
472	}
473
474	static const struct snd_soc_dai_ops atmel_classd_codec_dai_ops = {
475	.digital_mute = atmel_classd_codec_dai_digital_mute,
476	.startup = atmel_classd_codec_dai_startup,
477	.shutdown = atmel_classd_codec_dai_shutdown,
478	.hw_params = atmel_classd_codec_dai_hw_params,
479	.prepare = atmel_classd_codec_dai_prepare,
480	.trigger = atmel_classd_codec_dai_trigger,
481	};
482
483	#define ATMEL_CLASSD_CODEC_DAI_NAME "atmel-classd-hifi"
484
485	static struct snd_soc_dai_driver atmel_classd_codec_dai = {
486	.name = ATMEL_CLASSD_CODEC_DAI_NAME,
487	.playback = {
488	.stream_name = "Playback",
489	.channels_min = 2,
490	.channels_max = 2,
491	.rates = ATMEL_CLASSD_RATES,
492	.formats = SNDRV_PCM_FMTBIT_S16_LE,
493	},
494	.ops = &atmel_classd_codec_dai_ops,
495	};
496
497	/* ASoC sound card */
498	static int atmel_classd_asoc_card_init(struct device *dev,
499	struct snd_soc_card *card)
500	{
501	struct snd_soc_dai_link *dai_link;
502	struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
503
504	dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL);
505	if (!dai_link)
506	return -ENOMEM;
507
508	dai_link->name = "CLASSD";
509	dai_link->stream_name = "CLASSD PCM";
510	dai_link->codec_dai_name = ATMEL_CLASSD_CODEC_DAI_NAME;
511	dai_link->cpu_dai_name = dev_name(dev);
512	dai_link->codec_name = dev_name(dev);
513	dai_link->platform_name = dev_name(dev);
514
515	card->dai_link = dai_link;
516	card->num_links = 1;
517	card->name = dd->pdata->card_name;
518	card->dev = dev;
519
520	return 0;
521	};
522
523	/* regmap configuration */
524	static const struct reg_default atmel_classd_reg_defaults[] = {
525	{ CLASSD_INTPMR, 0x00301212 },
526	};
527
528	#define ATMEL_CLASSD_REG_MAX 0xE4
529	static const struct regmap_config atmel_classd_regmap_config = {
530	.reg_bits = 32,
531	.reg_stride = 4,
532	.val_bits = 32,
533	.max_register = ATMEL_CLASSD_REG_MAX,
534
535	.cache_type = REGCACHE_FLAT,
536	.reg_defaults = atmel_classd_reg_defaults,
537	.num_reg_defaults = ARRAY_SIZE(atmel_classd_reg_defaults),
538	};
539
540	static int atmel_classd_probe(struct platform_device *pdev)
541	{
542	struct device *dev = &pdev->dev;
543	struct atmel_classd *dd;
544	struct resource *res;
545	void __iomem *io_base;
546	const struct atmel_classd_pdata *pdata;
547	struct snd_soc_card *card;
548	int ret;
549
550	pdata = dev_get_platdata(dev);
551	if (!pdata) {
552	pdata = atmel_classd_dt_init(dev);
553	if (IS_ERR(pdata))
554	return PTR_ERR(pdata);
555	}
556
557	dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL);
558	if (!dd)
559	return -ENOMEM;
560
561	dd->pdata = pdata;
562
563	dd->irq = platform_get_irq(pdev, 0);
564	if (dd->irq < 0) {
565	ret = dd->irq;
566	dev_err(dev, "failed to could not get irq: %d\n", ret);
567	return ret;
568	}
569
570	dd->pclk = devm_clk_get(dev, "pclk");
571	if (IS_ERR(dd->pclk)) {
572	ret = PTR_ERR(dd->pclk);
573	dev_err(dev, "failed to get peripheral clock: %d\n", ret);
574	return ret;
575	}
576
577	dd->gclk = devm_clk_get(dev, "gclk");
578	if (IS_ERR(dd->gclk)) {
579	ret = PTR_ERR(dd->gclk);
580	dev_err(dev, "failed to get GCK clock: %d\n", ret);
581	return ret;
582	}
583
584	dd->aclk = devm_clk_get(dev, "aclk");
585	if (IS_ERR(dd->aclk)) {
586	ret = PTR_ERR(dd->aclk);
587	dev_err(dev, "failed to get audio clock: %d\n", ret);
588	return ret;
589	}
590
591	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
592	if (!res) {
593	dev_err(dev, "no memory resource\n");
594	return -ENXIO;
595	}
596
597	io_base = devm_ioremap_resource(dev, res);
598	if (IS_ERR(io_base)) {
599	ret = PTR_ERR(io_base);
600	dev_err(dev, "failed to remap register memory: %d\n", ret);
601	return ret;
602	}
603
604	dd->phy_base = res->start;
605
606	dd->regmap = devm_regmap_init_mmio(dev, io_base,
607	&atmel_classd_regmap_config);
608	if (IS_ERR(dd->regmap)) {
609	ret = PTR_ERR(dd->regmap);
610	dev_err(dev, "failed to init register map: %d\n", ret);
611	return ret;
612	}
613
614	ret = devm_snd_soc_register_component(dev,
615	&atmel_classd_cpu_dai_component,
616	&atmel_classd_cpu_dai, 1);
617	if (ret) {
618	dev_err(dev, "could not register CPU DAI: %d\n", ret);
619	return ret;
620	}
621
622	ret = devm_snd_dmaengine_pcm_register(dev,
623	&atmel_classd_dmaengine_pcm_config,
624	0);
625	if (ret) {
626	dev_err(dev, "could not register platform: %d\n", ret);
627	return ret;
628	}
629
630	ret = snd_soc_register_codec(dev, &soc_codec_dev_classd,
631	&atmel_classd_codec_dai, 1);
632	if (ret) {
633	dev_err(dev, "could not register codec: %d\n", ret);
634	return ret;
635	}
636
637	/* register sound card */
638	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
639	if (!card)
640	return -ENOMEM;
641
642	snd_soc_card_set_drvdata(card, dd);
643	platform_set_drvdata(pdev, card);
644
645	ret = atmel_classd_asoc_card_init(dev, card);
646	if (ret) {
647	dev_err(dev, "failed to init sound card\n");
648	return ret;
649	}
650
651	ret = devm_snd_soc_register_card(dev, card);
652	if (ret) {
653	dev_err(dev, "failed to register sound card: %d\n", ret);
654	return ret;
655	}
656
657	return 0;
658	}
659
660	static int atmel_classd_remove(struct platform_device *pdev)
661	{
662	snd_soc_unregister_codec(&pdev->dev);
663	return 0;
664	}
665
666	static struct platform_driver atmel_classd_driver = {
667	.driver = {
668	.name = "atmel-classd",
669	.of_match_table = of_match_ptr(atmel_classd_of_match),
670	.pm = &snd_soc_pm_ops,
671	},
672	.probe = atmel_classd_probe,
673	.remove = atmel_classd_remove,
674	};
675	module_platform_driver(atmel_classd_driver);
676
677	MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture");
678	MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
679	MODULE_LICENSE("GPL");