[linux-2.6-block.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 <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;
	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 = snd_soc_update_bits(codec, 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;
	int val = 0;

	/* set the IEC958 bits: consumer mode, no copyright bit */
	val |= IEC958_AES0_CON_NOT_COPYRIGHT;
	snd_soc_write(codec, 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;
	}

	return snd_soc_write(codec, AK4104_REG_CHN_STATUS(3), val);
}

static const struct snd_soc_dai_ops ak4101_dai_ops = {
	.hw_params = ak4104_hw_params,
	.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;
	ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP);
	if (ret != 0)
		return ret;

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

	/* enable transmitter */
	ret = snd_soc_update_bits(codec, 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)
{
	snd_soc_update_bits(codec, 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 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 = regmap_init_spi(spi, &ak4104_regmap);
	if (IS_ERR(ak4104->regmap)) {
		ret = PTR_ERR(ak4104->regmap);
		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)
		goto err;
	if (val != AK4104_RESERVED_VAL) {
		ret = -ENODEV;
		goto err;
	}

	spi_set_drvdata(spi, ak4104);

	ret = snd_soc_register_codec(&spi->dev,
			&soc_codec_device_ak4104, &ak4104_dai, 1);
	if (ret != 0)
		goto err;

	return 0;

err:
	regmap_exit(ak4104->regmap);
	return ret;
}

static int __devexit ak4104_spi_remove(struct spi_device *spi)
{
	struct ak4104_private *ak4101 = spi_get_drvdata(spi);
	regmap_exit(ak4101->regmap);
	snd_soc_unregister_codec(&spi->dev);
	return 0;
}

static struct spi_driver ak4104_spi_driver = {
	.driver  = {
		.name   = DRV_NAME,
		.owner  = THIS_MODULE,
	},
	.probe  = ak4104_spi_probe,
	.remove = __devexit_p(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>
	18	#include <sound/asoundef.h>
	19
a381934e DM	20	/* AK4104 registers addresses */
	21	#define AK4104_REG_CONTROL1 0x00
	22	#define AK4104_REG_RESERVED 0x01
	23	#define AK4104_REG_CONTROL2 0x02
	24	#define AK4104_REG_TX 0x03
	25	#define AK4104_REG_CHN_STATUS(x) ((x) + 0x04)
	26	#define AK4104_NUM_REGS 10
	27
	28	#define AK4104_REG_MASK 0x1f
	29	#define AK4104_READ 0xc0
	30	#define AK4104_WRITE 0xe0
	31	#define AK4104_RESERVED_VAL 0x5b
	32
	33	/* Bit masks for AK4104 registers */
	34	#define AK4104_CONTROL1_RSTN (1 << 0)
	35	#define AK4104_CONTROL1_PW (1 << 1)
	36	#define AK4104_CONTROL1_DIF0 (1 << 2)
	37	#define AK4104_CONTROL1_DIF1 (1 << 3)
	38
	39	#define AK4104_CONTROL2_SEL0 (1 << 0)
	40	#define AK4104_CONTROL2_SEL1 (1 << 1)
	41	#define AK4104_CONTROL2_MODE (1 << 2)
	42
	43	#define AK4104_TX_TXE (1 << 0)
	44	#define AK4104_TX_V (1 << 1)
	45
f0fba2ad	46	#define DRV_NAME "ak4104-codec"
a381934e DM	47
a381934e DM	48	struct ak4104_private {
2901d6eb	49	struct regmap *regmap;
a381934e DM	50	};
a381934e DM	51
a381934e DM	52	static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai,
	53	unsigned int format)
	54	{
	55	struct snd_soc_codec *codec = codec_dai->codec;
	56	int val = 0;
2901d6eb	57	int ret;
a381934e	58
a381934e DM	59	/* set DAI format */
	60	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
	61	case SND_SOC_DAIFMT_RIGHT_J:
	62	break;
	63	case SND_SOC_DAIFMT_LEFT_J:
	64	val \|= AK4104_CONTROL1_DIF0;
	65	break;
	66	case SND_SOC_DAIFMT_I2S:
	67	val \|= AK4104_CONTROL1_DIF0 \| AK4104_CONTROL1_DIF1;
	68	break;
	69	default:
	70	dev_err(codec->dev, "invalid dai format\n");
	71	return -EINVAL;
	72	}
	73
	74	/* This device can only be slave */
	75	if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
	76	return -EINVAL;
	77
afad95f8 MB	78	ret = snd_soc_update_bits(codec, AK4104_REG_CONTROL1,
	79	AK4104_CONTROL1_DIF0 \| AK4104_CONTROL1_DIF1,
	80	val);
	81	if (ret < 0)
	82	return ret;
	83
	84	return 0;
a381934e DM	85	}
	86
	87	static int ak4104_hw_params(struct snd_pcm_substream *substream,
	88	struct snd_pcm_hw_params *params,
	89	struct snd_soc_dai *dai)
	90	{
e6968a17	91	struct snd_soc_codec *codec = dai->codec;
a381934e DM	92	int val = 0;
	93
	94	/* set the IEC958 bits: consumer mode, no copyright bit */
	95	val \|= IEC958_AES0_CON_NOT_COPYRIGHT;
34baf220	96	snd_soc_write(codec, AK4104_REG_CHN_STATUS(0), val);
a381934e DM	97
	98	val = 0;
	99
	100	switch (params_rate(params)) {
08201deb DM	101	case 22050:
	102	val \|= IEC958_AES3_CON_FS_22050;
	103	break;
	104	case 24000:
	105	val \|= IEC958_AES3_CON_FS_24000;
	106	break;
	107	case 32000:
	108	val \|= IEC958_AES3_CON_FS_32000;
	109	break;
a381934e DM	110	case 44100:
	111	val \|= IEC958_AES3_CON_FS_44100;
	112	break;
	113	case 48000:
	114	val \|= IEC958_AES3_CON_FS_48000;
	115	break;
08201deb DM	116	case 88200:
	117	val \|= IEC958_AES3_CON_FS_88200;
	118	break;
	119	case 96000:
	120	val \|= IEC958_AES3_CON_FS_96000;
	121	break;
	122	case 176400:
	123	val \|= IEC958_AES3_CON_FS_176400;
	124	break;
	125	case 192000:
	126	val \|= IEC958_AES3_CON_FS_192000;
a381934e DM	127	break;
	128	default:
	129	dev_err(codec->dev, "unsupported sampling rate\n");
	130	return -EINVAL;
	131	}
	132
34baf220	133	return snd_soc_write(codec, AK4104_REG_CHN_STATUS(3), val);
a381934e DM	134	}
a381934e DM	135
85e7652d	136	static const struct snd_soc_dai_ops ak4101_dai_ops = {
65ec1cd1 MB	137	.hw_params = ak4104_hw_params,
	138	.set_fmt = ak4104_set_dai_fmt,
	139	};
	140
f0fba2ad LG	141	static struct snd_soc_dai_driver ak4104_dai = {
f0fba2ad LG	142	.name = "ak4104-hifi",
a381934e DM	143	.playback = {
	144	.stream_name = "Playback",
	145	.channels_min = 2,
	146	.channels_max = 2,
617b14c5	147	.rates = SNDRV_PCM_RATE_8000_192000,
a381934e DM	148	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
	149	SNDRV_PCM_FMTBIT_S24_3LE \|
	150	SNDRV_PCM_FMTBIT_S24_LE
	151	},
65ec1cd1	152	.ops = &ak4101_dai_ops,
a381934e DM	153	};
a381934e DM	154
f0fba2ad	155	static int ak4104_probe(struct snd_soc_codec *codec)
a381934e	156	{
f0fba2ad	157	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
2901d6eb	158	int ret;
a381934e	159
2901d6eb MB	160	codec->control_data = ak4104->regmap;
	161	ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP);
	162	if (ret != 0)
a381934e	163	return ret;
a381934e DM	164
a381934e DM	165	/* set power-up and non-reset bits */
afad95f8 MB	166	ret = snd_soc_update_bits(codec, AK4104_REG_CONTROL1,
	167	AK4104_CONTROL1_PW \| AK4104_CONTROL1_RSTN,
	168	AK4104_CONTROL1_PW \| AK4104_CONTROL1_RSTN);
a381934e	169	if (ret < 0)
f0fba2ad	170	return ret;
a381934e DM	171
a381934e DM	172	/* enable transmitter */
afad95f8 MB	173	ret = snd_soc_update_bits(codec, AK4104_REG_TX,
afad95f8 MB	174	AK4104_TX_TXE, AK4104_TX_TXE);
a381934e	175	if (ret < 0)
f0fba2ad	176	return ret;
a381934e	177
a381934e	178	return 0;
a381934e DM	179	}
a381934e DM	180
f0fba2ad	181	static int ak4104_remove(struct snd_soc_codec *codec)
a381934e	182	{
afad95f8 MB	183	snd_soc_update_bits(codec, AK4104_REG_CONTROL1,
afad95f8 MB	184	AK4104_CONTROL1_PW \| AK4104_CONTROL1_RSTN, 0);
a381934e	185
afad95f8	186	return 0;
a381934e DM	187	}
a381934e DM	188
f0fba2ad LG	189	static struct snd_soc_codec_driver soc_codec_device_ak4104 = {
	190	.probe = ak4104_probe,
	191	.remove = ak4104_remove,
2901d6eb MB	192	};
	193
	194	static const struct regmap_config ak4104_regmap = {
	195	.reg_bits = 8,
	196	.val_bits = 8,
	197
	198	.max_register = AK4104_NUM_REGS - 1,
	199	.read_flag_mask = AK4104_READ,
	200	.write_flag_mask = AK4104_WRITE,
	201
	202	.cache_type = REGCACHE_RBTREE,
f0fba2ad LG	203	};
	204
	205	static int ak4104_spi_probe(struct spi_device *spi)
a381934e	206	{
f0fba2ad	207	struct ak4104_private *ak4104;
2901d6eb	208	unsigned int val;
a381934e DM	209	int ret;
a381934e DM	210
f0fba2ad LG	211	spi->bits_per_word = 8;
	212	spi->mode = SPI_MODE_0;
	213	ret = spi_setup(spi);
	214	if (ret < 0)
a381934e	215	return ret;
a381934e	216
3922d518 AL	217	ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private),
3922d518 AL	218	GFP_KERNEL);
f0fba2ad LG	219	if (ak4104 == NULL)
	220	return -ENOMEM;
	221
2901d6eb MB	222	ak4104->regmap = regmap_init_spi(spi, &ak4104_regmap);
	223	if (IS_ERR(ak4104->regmap)) {
	224	ret = PTR_ERR(ak4104->regmap);
	225	return ret;
	226	}
	227
	228	/* read the 'reserved' register - according to the datasheet, it
	229	* should contain 0x5b. Not a good way to verify the presence of
	230	* the device, but there is no hardware ID register. */
	231	ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
	232	if (ret != 0)
	233	goto err;
	234	if (val != AK4104_RESERVED_VAL) {
	235	ret = -ENODEV;
	236	goto err;
	237	}
	238
f0fba2ad LG	239	spi_set_drvdata(spi, ak4104);
	240
	241	ret = snd_soc_register_codec(&spi->dev,
	242	&soc_codec_device_ak4104, &ak4104_dai, 1);
2901d6eb MB	243	if (ret != 0)
	244	goto err;
	245
	246	return 0;
	247
	248	err:
	249	regmap_exit(ak4104->regmap);
f0fba2ad	250	return ret;
a381934e DM	251	}
a381934e DM	252
f0fba2ad	253	static int __devexit ak4104_spi_remove(struct spi_device *spi)
a381934e	254	{
2901d6eb MB	255	struct ak4104_private *ak4101 = spi_get_drvdata(spi);
2901d6eb MB	256	regmap_exit(ak4101->regmap);
f0fba2ad	257	snd_soc_unregister_codec(&spi->dev);
a381934e	258	return 0;
f0fba2ad	259	}
a381934e DM	260
	261	static struct spi_driver ak4104_spi_driver = {
	262	.driver = {
	263	.name = DRV_NAME,
	264	.owner = THIS_MODULE,
	265	},
	266	.probe = ak4104_spi_probe,
	267	.remove = __devexit_p(ak4104_spi_remove),
	268	};
	269
38d78baf	270	module_spi_driver(ak4104_spi_driver);
a381934e DM	271
	272	MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
	273	MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver");
	274	MODULE_LICENSE("GPL");
	275