[mirror_ubuntu-artful-kernel.git] / sound / soc / codecs / ak4104.c

/*
 * AK4104 ALSA SoC (ASoC) driver
 *
 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
 *
 *  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/module.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <linux/spi/spi.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <sound/asoundef.h>

/* AK4104 registers addresses */
#define AK4104_REG_CONTROL1		0x00
#define AK4104_REG_RESERVED		0x01
#define AK4104_REG_CONTROL2		0x02
#define AK4104_REG_TX			0x03
#define AK4104_REG_CHN_STATUS(x)	((x) + 0x04)
#define AK4104_NUM_REGS			10

#define AK4104_REG_MASK			0x1f
#define AK4104_READ			0xc0
#define AK4104_WRITE			0xe0
#define AK4104_RESERVED_VAL		0x5b

/* Bit masks for AK4104 registers */
#define AK4104_CONTROL1_RSTN		(1 << 0)
#define AK4104_CONTROL1_PW		(1 << 1)
#define AK4104_CONTROL1_DIF0		(1 << 2)
#define AK4104_CONTROL1_DIF1		(1 << 3)

#define AK4104_CONTROL2_SEL0		(1 << 0)
#define AK4104_CONTROL2_SEL1		(1 << 1)
#define AK4104_CONTROL2_MODE		(1 << 2)

#define AK4104_TX_TXE			(1 << 0)
#define AK4104_TX_V			(1 << 1)

#define DRV_NAME "ak4104-codec"

struct ak4104_private {
	struct regmap *regmap;
};

static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai,
			      unsigned int format)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
	int val = 0;
	int ret;

	/* set DAI format */
	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		val |= AK4104_CONTROL1_DIF0;
		break;
	case SND_SOC_DAIFMT_I2S:
		val |= AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1;
		break;
	default:
		dev_err(codec->dev, "invalid dai format\n");
		return -EINVAL;
	}

	/* This device can only be slave */
	if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
		return -EINVAL;

	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
				 AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1,
				 val);
	if (ret < 0)
		return ret;

	return 0;
}

static int ak4104_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
	int ret, val = 0;

	/* set the IEC958 bits: consumer mode, no copyright bit */
	val |= IEC958_AES0_CON_NOT_COPYRIGHT;
	regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(0), val);

	val = 0;

	switch (params_rate(params)) {
	case 22050:
		val |= IEC958_AES3_CON_FS_22050;
		break;
	case 24000:
		val |= IEC958_AES3_CON_FS_24000;
		break;
	case 32000:
		val |= IEC958_AES3_CON_FS_32000;
		break;
	case 44100:
		val |= IEC958_AES3_CON_FS_44100;
		break;
	case 48000:
		val |= IEC958_AES3_CON_FS_48000;
		break;
	case 88200:
		val |= IEC958_AES3_CON_FS_88200;
		break;
	case 96000:
		val |= IEC958_AES3_CON_FS_96000;
		break;
	case 176400:
		val |= IEC958_AES3_CON_FS_176400;
		break;
	case 192000:
		val |= IEC958_AES3_CON_FS_192000;
		break;
	default:
		dev_err(codec->dev, "unsupported sampling rate\n");
		return -EINVAL;
	}

	ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val);
	if (ret < 0)
		return ret;

	/* enable transmitter */
	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
				 AK4104_TX_TXE, AK4104_TX_TXE);
	if (ret < 0)
		return ret;

	return 0;
}

static int ak4104_hw_free(struct snd_pcm_substream *substream,
			  struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);

	/* disable transmitter */
	return regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
				  AK4104_TX_TXE, 0);
}

static const struct snd_soc_dai_ops ak4101_dai_ops = {
	.hw_params = ak4104_hw_params,
	.hw_free = ak4104_hw_free,
	.set_fmt = ak4104_set_dai_fmt,
};

static struct snd_soc_dai_driver ak4104_dai = {
	.name = "ak4104-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_192000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE  |
			   SNDRV_PCM_FMTBIT_S24_3LE |
			   SNDRV_PCM_FMTBIT_S24_LE
	},
	.ops = &ak4101_dai_ops,
};

static int ak4104_probe(struct snd_soc_codec *codec)
{
	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
	int ret;

	codec->control_data = ak4104->regmap;

	/* set power-up and non-reset bits */
	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
				 AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN,
				 AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN);
	if (ret < 0)
		return ret;

	/* enable transmitter */
	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
				 AK4104_TX_TXE, AK4104_TX_TXE);
	if (ret < 0)
		return ret;

	return 0;
}

static int ak4104_remove(struct snd_soc_codec *codec)
{
	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);

	regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
			   AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0);

	return 0;
}

static struct snd_soc_codec_driver soc_codec_device_ak4104 = {
	.probe =	ak4104_probe,
	.remove =	ak4104_remove,
};

static const struct regmap_config ak4104_regmap = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = AK4104_NUM_REGS - 1,
	.read_flag_mask = AK4104_READ,
	.write_flag_mask = AK4104_WRITE,

	.cache_type = REGCACHE_RBTREE,
};

static int ak4104_spi_probe(struct spi_device *spi)
{
	struct device_node *np = spi->dev.of_node;
	struct ak4104_private *ak4104;
	unsigned int val;
	int ret;

	spi->bits_per_word = 8;
	spi->mode = SPI_MODE_0;
	ret = spi_setup(spi);
	if (ret < 0)
		return ret;

	ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private),
			      GFP_KERNEL);
	if (ak4104 == NULL)
		return -ENOMEM;

	ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);
	if (IS_ERR(ak4104->regmap)) {
		ret = PTR_ERR(ak4104->regmap);
		return ret;
	}

	if (np) {
		enum of_gpio_flags flags;
		int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);

		if (gpio_is_valid(gpio)) {
			ret = devm_gpio_request_one(&spi->dev, gpio,
				     flags & OF_GPIO_ACTIVE_LOW ?
					GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH,
				     "ak4104 reset");
			if (ret < 0)
				return ret;
		}
	}

	/* read the 'reserved' register - according to the datasheet, it
	 * should contain 0x5b. Not a good way to verify the presence of
	 * the device, but there is no hardware ID register. */
	ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
	if (ret != 0)
		return ret;
	if (val != AK4104_RESERVED_VAL)
		return -ENODEV;

	spi_set_drvdata(spi, ak4104);

	ret = snd_soc_register_codec(&spi->dev,
			&soc_codec_device_ak4104, &ak4104_dai, 1);
	return ret;
}

static int ak4104_spi_remove(struct spi_device *spi)
{
	snd_soc_unregister_codec(&spi->dev);
	return 0;
}

static const struct of_device_id ak4104_of_match[] = {
	{ .compatible = "asahi-kasei,ak4104", },
	{ }
};
MODULE_DEVICE_TABLE(of, ak4104_of_match);

static struct spi_driver ak4104_spi_driver = {
	.driver  = {
		.name   = DRV_NAME,
		.owner  = THIS_MODULE,
		.of_match_table = ak4104_of_match,
	},
	.probe  = ak4104_spi_probe,
	.remove = ak4104_spi_remove,
};

module_spi_driver(ak4104_spi_driver);

MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
a381934e DM	1	/*
	2	* AK4104 ALSA SoC (ASoC) driver
	3	*
	4	* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2 of the License, or (at your
	9	* option) any later version.
	10	*/
	11
	12	#include <linux/module.h>
5a0e3ad6	13	#include <linux/slab.h>
a381934e DM	14	#include <sound/core.h>
	15	#include <sound/soc.h>
	16	#include <sound/initval.h>
	17	#include <linux/spi/spi.h>
385a4c2e DM	18	#include <linux/of_device.h>
385a4c2e DM	19	#include <linux/of_gpio.h>
a381934e DM	20	#include <sound/asoundef.h>
a381934e DM	21
a381934e DM	22	/* AK4104 registers addresses */
	23	#define AK4104_REG_CONTROL1 0x00
	24	#define AK4104_REG_RESERVED 0x01
	25	#define AK4104_REG_CONTROL2 0x02
	26	#define AK4104_REG_TX 0x03
	27	#define AK4104_REG_CHN_STATUS(x) ((x) + 0x04)
	28	#define AK4104_NUM_REGS 10
	29
	30	#define AK4104_REG_MASK 0x1f
	31	#define AK4104_READ 0xc0
	32	#define AK4104_WRITE 0xe0
	33	#define AK4104_RESERVED_VAL 0x5b
	34
	35	/* Bit masks for AK4104 registers */
	36	#define AK4104_CONTROL1_RSTN (1 << 0)
	37	#define AK4104_CONTROL1_PW (1 << 1)
	38	#define AK4104_CONTROL1_DIF0 (1 << 2)
	39	#define AK4104_CONTROL1_DIF1 (1 << 3)
	40
	41	#define AK4104_CONTROL2_SEL0 (1 << 0)
	42	#define AK4104_CONTROL2_SEL1 (1 << 1)
	43	#define AK4104_CONTROL2_MODE (1 << 2)
	44
	45	#define AK4104_TX_TXE (1 << 0)
	46	#define AK4104_TX_V (1 << 1)
	47
f0fba2ad	48	#define DRV_NAME "ak4104-codec"
a381934e DM	49
a381934e DM	50	struct ak4104_private {
2901d6eb	51	struct regmap *regmap;
a381934e DM	52	};
a381934e DM	53
a381934e DM	54	static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai,
	55	unsigned int format)
	56	{
	57	struct snd_soc_codec *codec = codec_dai->codec;
b0ec761b	58	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
a381934e	59	int val = 0;
2901d6eb	60	int ret;
a381934e	61
a381934e DM	62	/* set DAI format */
	63	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
	64	case SND_SOC_DAIFMT_RIGHT_J:
	65	break;
	66	case SND_SOC_DAIFMT_LEFT_J:
	67	val \|= AK4104_CONTROL1_DIF0;
	68	break;
	69	case SND_SOC_DAIFMT_I2S:
	70	val \|= AK4104_CONTROL1_DIF0 \| AK4104_CONTROL1_DIF1;
	71	break;
	72	default:
	73	dev_err(codec->dev, "invalid dai format\n");
	74	return -EINVAL;
	75	}
	76
	77	/* This device can only be slave */
	78	if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
	79	return -EINVAL;
	80
b0ec761b DM	81	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
	82	AK4104_CONTROL1_DIF0 \| AK4104_CONTROL1_DIF1,
	83	val);
afad95f8 MB	84	if (ret < 0)
	85	return ret;
	86
	87	return 0;
a381934e DM	88	}
	89
	90	static int ak4104_hw_params(struct snd_pcm_substream *substream,
	91	struct snd_pcm_hw_params *params,
	92	struct snd_soc_dai *dai)
	93	{
e6968a17	94	struct snd_soc_codec *codec = dai->codec;
b0ec761b	95	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
b692a436	96	int ret, val = 0;
a381934e DM	97
	98	/* set the IEC958 bits: consumer mode, no copyright bit */
	99	val \|= IEC958_AES0_CON_NOT_COPYRIGHT;
b0ec761b	100	regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(0), val);
a381934e DM	101
	102	val = 0;
	103
	104	switch (params_rate(params)) {
08201deb DM	105	case 22050:
	106	val \|= IEC958_AES3_CON_FS_22050;
	107	break;
	108	case 24000:
	109	val \|= IEC958_AES3_CON_FS_24000;
	110	break;
	111	case 32000:
	112	val \|= IEC958_AES3_CON_FS_32000;
	113	break;
a381934e DM	114	case 44100:
	115	val \|= IEC958_AES3_CON_FS_44100;
	116	break;
	117	case 48000:
	118	val \|= IEC958_AES3_CON_FS_48000;
	119	break;
08201deb DM	120	case 88200:
	121	val \|= IEC958_AES3_CON_FS_88200;
	122	break;
	123	case 96000:
	124	val \|= IEC958_AES3_CON_FS_96000;
	125	break;
	126	case 176400:
	127	val \|= IEC958_AES3_CON_FS_176400;
	128	break;
	129	case 192000:
	130	val \|= IEC958_AES3_CON_FS_192000;
a381934e DM	131	break;
	132	default:
	133	dev_err(codec->dev, "unsupported sampling rate\n");
	134	return -EINVAL;
	135	}
	136
b692a436 DM	137	ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val);
	138	if (ret < 0)
	139	return ret;
	140
	141	/* enable transmitter */
	142	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
	143	AK4104_TX_TXE, AK4104_TX_TXE);
	144	if (ret < 0)
	145	return ret;
	146
	147	return 0;
	148	}
	149
	150	static int ak4104_hw_free(struct snd_pcm_substream *substream,
	151	struct snd_soc_dai *dai)
	152	{
	153	struct snd_soc_codec *codec = dai->codec;
	154	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
	155
	156	/* disable transmitter */
	157	return regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
	158	AK4104_TX_TXE, 0);
a381934e DM	159	}
a381934e DM	160
85e7652d	161	static const struct snd_soc_dai_ops ak4101_dai_ops = {
65ec1cd1	162	.hw_params = ak4104_hw_params,
b692a436	163	.hw_free = ak4104_hw_free,
65ec1cd1 MB	164	.set_fmt = ak4104_set_dai_fmt,
	165	};
	166
f0fba2ad LG	167	static struct snd_soc_dai_driver ak4104_dai = {
f0fba2ad LG	168	.name = "ak4104-hifi",
a381934e DM	169	.playback = {
	170	.stream_name = "Playback",
	171	.channels_min = 2,
	172	.channels_max = 2,
617b14c5	173	.rates = SNDRV_PCM_RATE_8000_192000,
a381934e DM	174	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
	175	SNDRV_PCM_FMTBIT_S24_3LE \|
	176	SNDRV_PCM_FMTBIT_S24_LE
	177	},
65ec1cd1	178	.ops = &ak4101_dai_ops,
a381934e DM	179	};
a381934e DM	180
f0fba2ad	181	static int ak4104_probe(struct snd_soc_codec *codec)
a381934e	182	{
f0fba2ad	183	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
2901d6eb	184	int ret;
a381934e	185
2901d6eb	186	codec->control_data = ak4104->regmap;
a381934e DM	187
a381934e DM	188	/* set power-up and non-reset bits */
b0ec761b DM	189	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
	190	AK4104_CONTROL1_PW \| AK4104_CONTROL1_RSTN,
	191	AK4104_CONTROL1_PW \| AK4104_CONTROL1_RSTN);
a381934e	192	if (ret < 0)
f0fba2ad	193	return ret;
a381934e DM	194
a381934e DM	195	/* enable transmitter */
b0ec761b DM	196	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
b0ec761b DM	197	AK4104_TX_TXE, AK4104_TX_TXE);
a381934e	198	if (ret < 0)
f0fba2ad	199	return ret;
a381934e	200
a381934e	201	return 0;
a381934e DM	202	}
a381934e DM	203
f0fba2ad	204	static int ak4104_remove(struct snd_soc_codec *codec)
a381934e	205	{
b0ec761b DM	206	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
	207
	208	regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
	209	AK4104_CONTROL1_PW \| AK4104_CONTROL1_RSTN, 0);
a381934e	210
afad95f8	211	return 0;
a381934e DM	212	}
a381934e DM	213
f0fba2ad LG	214	static struct snd_soc_codec_driver soc_codec_device_ak4104 = {
	215	.probe = ak4104_probe,
	216	.remove = ak4104_remove,
2901d6eb MB	217	};
	218
	219	static const struct regmap_config ak4104_regmap = {
	220	.reg_bits = 8,
	221	.val_bits = 8,
	222
	223	.max_register = AK4104_NUM_REGS - 1,
	224	.read_flag_mask = AK4104_READ,
	225	.write_flag_mask = AK4104_WRITE,
	226
	227	.cache_type = REGCACHE_RBTREE,
f0fba2ad LG	228	};
	229
	230	static int ak4104_spi_probe(struct spi_device *spi)
a381934e	231	{
385a4c2e	232	struct device_node *np = spi->dev.of_node;
f0fba2ad	233	struct ak4104_private *ak4104;
2901d6eb	234	unsigned int val;
a381934e DM	235	int ret;
a381934e DM	236
f0fba2ad LG	237	spi->bits_per_word = 8;
	238	spi->mode = SPI_MODE_0;
	239	ret = spi_setup(spi);
	240	if (ret < 0)
a381934e	241	return ret;
a381934e	242
3922d518 AL	243	ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private),
3922d518 AL	244	GFP_KERNEL);
f0fba2ad LG	245	if (ak4104 == NULL)
	246	return -ENOMEM;
	247
a273cd13	248	ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);
2901d6eb MB	249	if (IS_ERR(ak4104->regmap)) {
	250	ret = PTR_ERR(ak4104->regmap);
	251	return ret;
	252	}
	253
385a4c2e DM	254	if (np) {
	255	enum of_gpio_flags flags;
	256	int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);
	257
	258	if (gpio_is_valid(gpio)) {
	259	ret = devm_gpio_request_one(&spi->dev, gpio,
	260	flags & OF_GPIO_ACTIVE_LOW ?
	261	GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH,
	262	"ak4104 reset");
	263	if (ret < 0)
	264	return ret;
	265	}
	266	}
	267
2901d6eb MB	268	/* read the 'reserved' register - according to the datasheet, it
	269	* should contain 0x5b. Not a good way to verify the presence of
	270	* the device, but there is no hardware ID register. */
	271	ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
	272	if (ret != 0)
a273cd13 TB	273	return ret;
	274	if (val != AK4104_RESERVED_VAL)
	275	return -ENODEV;
2901d6eb	276
f0fba2ad LG	277	spi_set_drvdata(spi, ak4104);
	278
	279	ret = snd_soc_register_codec(&spi->dev,
	280	&soc_codec_device_ak4104, &ak4104_dai, 1);
f0fba2ad	281	return ret;
a381934e DM	282	}
a381934e DM	283
7a79e94e	284	static int ak4104_spi_remove(struct spi_device *spi)
a381934e	285	{
f0fba2ad	286	snd_soc_unregister_codec(&spi->dev);
a381934e	287	return 0;
f0fba2ad	288	}
a381934e	289
ac5dbea0 DM	290	static const struct of_device_id ak4104_of_match[] = {
	291	{ .compatible = "asahi-kasei,ak4104", },
	292	{ }
	293	};
	294	MODULE_DEVICE_TABLE(of, ak4104_of_match);
	295
a381934e DM	296	static struct spi_driver ak4104_spi_driver = {
	297	.driver = {
	298	.name = DRV_NAME,
	299	.owner = THIS_MODULE,
ac5dbea0	300	.of_match_table = ak4104_of_match,
a381934e DM	301	},
a381934e DM	302	.probe = ak4104_spi_probe,
7a79e94e	303	.remove = ak4104_spi_remove,
a381934e DM	304	};
a381934e DM	305
38d78baf	306	module_spi_driver(ak4104_spi_driver);
a381934e DM	307
	308	MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
	309	MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver");
	310	MODULE_LICENSE("GPL");
	311