[deliverable/linux.git] / sound / soc / codecs / wm8741.c

/*
 * wm8741.c  --  WM8741 ALSA SoC Audio driver
 *
 * Copyright 2010 Wolfson Microelectronics plc
 *
 * Author: Ian Lartey <ian@opensource.wolfsonmicro.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 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "wm8741.h"

#define WM8741_NUM_SUPPLIES 2
static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
	"AVDD",
	"DVDD",
};

#define WM8741_NUM_RATES 6

/* codec private data */
struct wm8741_priv {
	enum snd_soc_control_type control_type;
	struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
	unsigned int sysclk;
	struct snd_pcm_hw_constraint_list *sysclk_constraints;
};

static const u16 wm8741_reg_defaults[WM8741_REGISTER_COUNT] = {
	0x0000,     /* R0  - DACLLSB Attenuation */
	0x0000,     /* R1  - DACLMSB Attenuation */
	0x0000,     /* R2  - DACRLSB Attenuation */
	0x0000,     /* R3  - DACRMSB Attenuation */
	0x0000,     /* R4  - Volume Control */
	0x000A,     /* R5  - Format Control */
	0x0000,     /* R6  - Filter Control */
	0x0000,     /* R7  - Mode Control 1 */
	0x0002,     /* R8  - Mode Control 2 */
	0x0000,	    /* R9  - Reset */
	0x0002,     /* R32 - ADDITONAL_CONTROL_1 */
};


static int wm8741_reset(struct snd_soc_codec *codec)
{
	return snd_soc_write(codec, WM8741_RESET, 0);
}

static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);

static const struct snd_kcontrol_new wm8741_snd_controls[] = {
SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
		 WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
		 WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
};

static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("VOUTLP"),
SND_SOC_DAPM_OUTPUT("VOUTLN"),
SND_SOC_DAPM_OUTPUT("VOUTRP"),
SND_SOC_DAPM_OUTPUT("VOUTRN"),
};

static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
	{ "VOUTLP", NULL, "DACL" },
	{ "VOUTLN", NULL, "DACL" },
	{ "VOUTRP", NULL, "DACR" },
	{ "VOUTRN", NULL, "DACR" },
};

static struct {
	int value;
	int ratio;
} lrclk_ratios[WM8741_NUM_RATES] = {
	{ 1, 128 },
	{ 2, 192 },
	{ 3, 256 },
	{ 4, 384 },
	{ 5, 512 },
	{ 6, 768 },
};

static unsigned int rates_11289[] = {
	44100, 88235,
};

static struct snd_pcm_hw_constraint_list constraints_11289 = {
	.count	= ARRAY_SIZE(rates_11289),
	.list	= rates_11289,
};

static unsigned int rates_12288[] = {
	32000, 48000, 96000,
};

static struct snd_pcm_hw_constraint_list constraints_12288 = {
	.count	= ARRAY_SIZE(rates_12288),
	.list	= rates_12288,
};

static unsigned int rates_16384[] = {
	32000,
};

static struct snd_pcm_hw_constraint_list constraints_16384 = {
	.count	= ARRAY_SIZE(rates_16384),
	.list	= rates_16384,
};

static unsigned int rates_16934[] = {
	44100, 88235,
};

static struct snd_pcm_hw_constraint_list constraints_16934 = {
	.count	= ARRAY_SIZE(rates_16934),
	.list	= rates_16934,
};

static unsigned int rates_18432[] = {
	48000, 96000,
};

static struct snd_pcm_hw_constraint_list constraints_18432 = {
	.count	= ARRAY_SIZE(rates_18432),
	.list	= rates_18432,
};

static unsigned int rates_22579[] = {
	44100, 88235, 1764000
};

static struct snd_pcm_hw_constraint_list constraints_22579 = {
	.count	= ARRAY_SIZE(rates_22579),
	.list	= rates_22579,
};

static unsigned int rates_24576[] = {
	32000, 48000, 96000, 192000
};

static struct snd_pcm_hw_constraint_list constraints_24576 = {
	.count	= ARRAY_SIZE(rates_24576),
	.list	= rates_24576,
};

static unsigned int rates_36864[] = {
	48000, 96000, 19200
};

static struct snd_pcm_hw_constraint_list constraints_36864 = {
	.count	= ARRAY_SIZE(rates_36864),
	.list	= rates_36864,
};


static int wm8741_startup(struct snd_pcm_substream *substream,
			  struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);

	/* The set of sample rates that can be supported depends on the
	 * MCLK supplied to the CODEC - enforce this.
	 */
	if (!wm8741->sysclk) {
		dev_err(codec->dev,
			"No MCLK configured, call set_sysclk() on init\n");
		return -EINVAL;
	}

	snd_pcm_hw_constraint_list(substream->runtime, 0,
				   SNDRV_PCM_HW_PARAM_RATE,
				   wm8741->sysclk_constraints);

	return 0;
}

static int wm8741_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 wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
	int i;

	/* Find a supported LRCLK ratio */
	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
		if (wm8741->sysclk / params_rate(params) ==
		    lrclk_ratios[i].ratio)
			break;
	}

	/* Should never happen, should be handled by constraints */
	if (i == ARRAY_SIZE(lrclk_ratios)) {
		dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
			wm8741->sysclk / params_rate(params));
		return -EINVAL;
	}

	/* bit size */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		iface |= 0x0001;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		iface |= 0x0002;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		iface |= 0x0003;
		break;
	default:
		dev_dbg(codec->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
			params_format(params));
		return -EINVAL;
	}

	dev_dbg(codec->dev, "wm8741_hw_params:    bit size param = %d",
		params_format(params));

	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	return 0;
}

static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
		int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);

	dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);

	switch (freq) {
	case 11289600:
		wm8741->sysclk_constraints = &constraints_11289;
		wm8741->sysclk = freq;
		return 0;

	case 12288000:
		wm8741->sysclk_constraints = &constraints_12288;
		wm8741->sysclk = freq;
		return 0;

	case 16384000:
		wm8741->sysclk_constraints = &constraints_16384;
		wm8741->sysclk = freq;
		return 0;

	case 16934400:
		wm8741->sysclk_constraints = &constraints_16934;
		wm8741->sysclk = freq;
		return 0;

	case 18432000:
		wm8741->sysclk_constraints = &constraints_18432;
		wm8741->sysclk = freq;
		return 0;

	case 22579200:
	case 33868800:
		wm8741->sysclk_constraints = &constraints_22579;
		wm8741->sysclk = freq;
		return 0;

	case 24576000:
		wm8741->sysclk_constraints = &constraints_24576;
		wm8741->sysclk = freq;
		return 0;

	case 36864000:
		wm8741->sysclk_constraints = &constraints_36864;
		wm8741->sysclk = freq;
		return 0;
	}
	return -EINVAL;
}

static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;

	/* check master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	/* interface format */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		iface |= 0x0008;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		iface |= 0x0004;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		iface |= 0x000C;
		break;
	case SND_SOC_DAIFMT_DSP_B:
		iface |= 0x001C;
		break;
	default:
		return -EINVAL;
	}

	/* clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_IB_IF:
		iface |= 0x0010;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		iface |= 0x0020;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		iface |= 0x0030;
		break;
	default:
		return -EINVAL;
	}


	dev_dbg(codec->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
				fmt & SND_SOC_DAIFMT_FORMAT_MASK,
				((fmt & SND_SOC_DAIFMT_INV_MASK)));

	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	return 0;
}

#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
			SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
			SNDRV_PCM_RATE_192000)

#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

static const struct snd_soc_dai_ops wm8741_dai_ops = {
	.startup	= wm8741_startup,
	.hw_params	= wm8741_hw_params,
	.set_sysclk	= wm8741_set_dai_sysclk,
	.set_fmt	= wm8741_set_dai_fmt,
};

static struct snd_soc_dai_driver wm8741_dai = {
	.name = "wm8741",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,  /* Mono modes not yet supported */
		.channels_max = 2,
		.rates = WM8741_RATES,
		.formats = WM8741_FORMATS,
	},
	.ops = &wm8741_dai_ops,
};

#ifdef CONFIG_PM
static int wm8741_resume(struct snd_soc_codec *codec)
{
	snd_soc_cache_sync(codec);
	return 0;
}
#else
#define wm8741_suspend NULL
#define wm8741_resume NULL
#endif

static int wm8741_probe(struct snd_soc_codec *codec)
{
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	int ret = 0;
	int i;

	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
		wm8741->supplies[i].supply = wm8741_supply_names[i];

	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8741->supplies),
				 wm8741->supplies);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
		goto err;
	}

	ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
				    wm8741->supplies);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
		goto err_get;
	}

	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8741->control_type);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		goto err_enable;
	}

	ret = wm8741_reset(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to issue reset\n");
		goto err_enable;
	}

	/* Change some default settings - latch VU */
	snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
			    WM8741_UPDATELL, WM8741_UPDATELL);
	snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
			    WM8741_UPDATELM, WM8741_UPDATELM);
	snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
			    WM8741_UPDATERL, WM8741_UPDATERL);
	snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
			    WM8741_UPDATERM, WM8741_UPDATERM);

	dev_dbg(codec->dev, "Successful registration\n");
	return ret;

err_enable:
	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
err_get:
	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
err:
	return ret;
}

static int wm8741_remove(struct snd_soc_codec *codec)
{
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);

	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);

	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
	.probe =	wm8741_probe,
	.remove =	wm8741_remove,
	.resume =	wm8741_resume,
	.reg_cache_size = ARRAY_SIZE(wm8741_reg_defaults),
	.reg_word_size = sizeof(u16),
	.reg_cache_default = wm8741_reg_defaults,

	.controls = wm8741_snd_controls,
	.num_controls = ARRAY_SIZE(wm8741_snd_controls),
	.dapm_widgets = wm8741_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
	.dapm_routes = wm8741_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
};

static const struct of_device_id wm8741_of_match[] = {
	{ .compatible = "wlf,wm8741", },
	{ }
};
MODULE_DEVICE_TABLE(of, wm8741_of_match);

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static int wm8741_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct wm8741_priv *wm8741;
	int ret;

	wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
			      GFP_KERNEL);
	if (wm8741 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, wm8741);
	wm8741->control_type = SND_SOC_I2C;

	ret = snd_soc_register_codec(&i2c->dev,
				     &soc_codec_dev_wm8741, &wm8741_dai, 1);

	return ret;
}

static int wm8741_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	return 0;
}

static const struct i2c_device_id wm8741_i2c_id[] = {
	{ "wm8741", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);

static struct i2c_driver wm8741_i2c_driver = {
	.driver = {
		.name = "wm8741",
		.owner = THIS_MODULE,
		.of_match_table = wm8741_of_match,
	},
	.probe =    wm8741_i2c_probe,
	.remove =   wm8741_i2c_remove,
	.id_table = wm8741_i2c_id,
};
#endif

#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8741_spi_probe(struct spi_device *spi)
{
	struct wm8741_priv *wm8741;
	int ret;

	wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
			     GFP_KERNEL);
	if (wm8741 == NULL)
		return -ENOMEM;

	wm8741->control_type = SND_SOC_SPI;
	spi_set_drvdata(spi, wm8741);

	ret = snd_soc_register_codec(&spi->dev,
			&soc_codec_dev_wm8741, &wm8741_dai, 1);
	return ret;
}

static int __devexit wm8741_spi_remove(struct spi_device *spi)
{
	snd_soc_unregister_codec(&spi->dev);
	return 0;
}

static struct spi_driver wm8741_spi_driver = {
	.driver = {
		.name	= "wm8741",
		.owner	= THIS_MODULE,
		.of_match_table = wm8741_of_match,
	},
	.probe		= wm8741_spi_probe,
	.remove		= __devexit_p(wm8741_spi_remove),
};
#endif /* CONFIG_SPI_MASTER */

static int __init wm8741_modinit(void)
{
	int ret = 0;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	ret = i2c_add_driver(&wm8741_i2c_driver);
	if (ret != 0)
		pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
#endif
#if defined(CONFIG_SPI_MASTER)
	ret = spi_register_driver(&wm8741_spi_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
		       ret);
	}
#endif

	return ret;
}
module_init(wm8741_modinit);

static void __exit wm8741_exit(void)
{
#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&wm8741_spi_driver);
#endif
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&wm8741_i2c_driver);
#endif
}
module_exit(wm8741_exit);

MODULE_DESCRIPTION("ASoC WM8741 driver");
MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
992bee40 IL	1	/*
	2	* wm8741.c -- WM8741 ALSA SoC Audio driver
	3	*
	4	* Copyright 2010 Wolfson Microelectronics plc
	5	*
	6	* Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
	7	*
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/moduleparam.h>
	16	#include <linux/init.h>
	17	#include <linux/delay.h>
	18	#include <linux/pm.h>
	19	#include <linux/i2c.h>
39e9b8d2	20	#include <linux/spi/spi.h>
992bee40 IL	21	#include <linux/regulator/consumer.h>
992bee40 IL	22	#include <linux/slab.h>
80080ec5	23	#include <linux/of_device.h>
992bee40 IL	24	#include <sound/core.h>
	25	#include <sound/pcm.h>
	26	#include <sound/pcm_params.h>
	27	#include <sound/soc.h>
992bee40 IL	28	#include <sound/initval.h>
	29	#include <sound/tlv.h>
	30
	31	#include "wm8741.h"
	32
992bee40 IL	33	#define WM8741_NUM_SUPPLIES 2
	34	static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
	35	"AVDD",
	36	"DVDD",
	37	};
	38
3fe4a5ee	39	#define WM8741_NUM_RATES 6
992bee40 IL	40
	41	/* codec private data */
	42	struct wm8741_priv {
f0fba2ad	43	enum snd_soc_control_type control_type;
992bee40 IL	44	struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
992bee40 IL	45	unsigned int sysclk;
3fe4a5ee	46	struct snd_pcm_hw_constraint_list *sysclk_constraints;
992bee40 IL	47	};
	48
	49	static const u16 wm8741_reg_defaults[WM8741_REGISTER_COUNT] = {
	50	0x0000, /* R0 - DACLLSB Attenuation */
	51	0x0000, /* R1 - DACLMSB Attenuation */
	52	0x0000, /* R2 - DACRLSB Attenuation */
	53	0x0000, /* R3 - DACRMSB Attenuation */
	54	0x0000, /* R4 - Volume Control */
	55	0x000A, /* R5 - Format Control */
	56	0x0000, /* R6 - Filter Control */
	57	0x0000, /* R7 - Mode Control 1 */
	58	0x0002, /* R8 - Mode Control 2 */
	59	0x0000, /* R9 - Reset */
	60	0x0002, /* R32 - ADDITONAL_CONTROL_1 */
	61	};
	62
	63
	64	static int wm8741_reset(struct snd_soc_codec *codec)
	65	{
	66	return snd_soc_write(codec, WM8741_RESET, 0);
	67	}
	68
	69	static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
	70	static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
	71
	72	static const struct snd_kcontrol_new wm8741_snd_controls[] = {
	73	SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
	74	WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
	75	SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
	76	WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
	77	};
	78
	79	static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
	80	SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
	81	SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
	82	SND_SOC_DAPM_OUTPUT("VOUTLP"),
	83	SND_SOC_DAPM_OUTPUT("VOUTLN"),
	84	SND_SOC_DAPM_OUTPUT("VOUTRP"),
	85	SND_SOC_DAPM_OUTPUT("VOUTRN"),
	86	};
	87
0e62780f	88	static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
992bee40 IL	89	{ "VOUTLP", NULL, "DACL" },
	90	{ "VOUTLN", NULL, "DACL" },
	91	{ "VOUTRP", NULL, "DACR" },
	92	{ "VOUTRN", NULL, "DACR" },
	93	};
	94
992bee40 IL	95	static struct {
	96	int value;
	97	int ratio;
	98	} lrclk_ratios[WM8741_NUM_RATES] = {
3fe4a5ee IL	99	{ 1, 128 },
	100	{ 2, 192 },
	101	{ 3, 256 },
	102	{ 4, 384 },
	103	{ 5, 512 },
	104	{ 6, 768 },
	105	};
	106
	107	static unsigned int rates_11289[] = {
	108	44100, 88235,
	109	};
	110
	111	static struct snd_pcm_hw_constraint_list constraints_11289 = {
	112	.count = ARRAY_SIZE(rates_11289),
	113	.list = rates_11289,
	114	};
	115
	116	static unsigned int rates_12288[] = {
	117	32000, 48000, 96000,
	118	};
	119
	120	static struct snd_pcm_hw_constraint_list constraints_12288 = {
	121	.count = ARRAY_SIZE(rates_12288),
	122	.list = rates_12288,
	123	};
	124
	125	static unsigned int rates_16384[] = {
	126	32000,
	127	};
	128
	129	static struct snd_pcm_hw_constraint_list constraints_16384 = {
	130	.count = ARRAY_SIZE(rates_16384),
	131	.list = rates_16384,
	132	};
	133
	134	static unsigned int rates_16934[] = {
	135	44100, 88235,
	136	};
	137
	138	static struct snd_pcm_hw_constraint_list constraints_16934 = {
	139	.count = ARRAY_SIZE(rates_16934),
	140	.list = rates_16934,
	141	};
	142
	143	static unsigned int rates_18432[] = {
	144	48000, 96000,
	145	};
	146
	147	static struct snd_pcm_hw_constraint_list constraints_18432 = {
	148	.count = ARRAY_SIZE(rates_18432),
	149	.list = rates_18432,
	150	};
	151
	152	static unsigned int rates_22579[] = {
	153	44100, 88235, 1764000
	154	};
	155
	156	static struct snd_pcm_hw_constraint_list constraints_22579 = {
	157	.count = ARRAY_SIZE(rates_22579),
	158	.list = rates_22579,
	159	};
	160
	161	static unsigned int rates_24576[] = {
	162	32000, 48000, 96000, 192000
163	};
164
165	static struct snd_pcm_hw_constraint_list constraints_24576 = {
166	.count = ARRAY_SIZE(rates_24576),
167	.list = rates_24576,
168	};
169
170	static unsigned int rates_36864[] = {
171	48000, 96000, 19200
172	};
173
174	static struct snd_pcm_hw_constraint_list constraints_36864 = {
175	.count = ARRAY_SIZE(rates_36864),
176	.list = rates_36864,
992bee40 IL	177	};
	178
	179
	180	static int wm8741_startup(struct snd_pcm_substream *substream,
	181	struct snd_soc_dai *dai)
	182	{
	183	struct snd_soc_codec *codec = dai->codec;
	184	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	185
	186	/* The set of sample rates that can be supported depends on the
	187	* MCLK supplied to the CODEC - enforce this.
	188	*/
	189	if (!wm8741->sysclk) {
	190	dev_err(codec->dev,
	191	"No MCLK configured, call set_sysclk() on init\n");
	192	return -EINVAL;
	193	}
	194
	195	snd_pcm_hw_constraint_list(substream->runtime, 0,
	196	SNDRV_PCM_HW_PARAM_RATE,
3fe4a5ee	197	wm8741->sysclk_constraints);
992bee40 IL	198
	199	return 0;
	200	}
	201
	202	static int wm8741_hw_params(struct snd_pcm_substream *substream,
	203	struct snd_pcm_hw_params *params,
	204	struct snd_soc_dai *dai)
	205	{
e6968a17	206	struct snd_soc_codec *codec = dai->codec;
992bee40 IL	207	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	208	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
	209	int i;
	210
	211	/* Find a supported LRCLK ratio */
	212	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
	213	if (wm8741->sysclk / params_rate(params) ==
	214	lrclk_ratios[i].ratio)
	215	break;
	216	}
	217
	218	/* Should never happen, should be handled by constraints */
	219	if (i == ARRAY_SIZE(lrclk_ratios)) {
	220	dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
	221	wm8741->sysclk / params_rate(params));
	222	return -EINVAL;
	223	}
	224
	225	/* bit size */
	226	switch (params_format(params)) {
	227	case SNDRV_PCM_FORMAT_S16_LE:
	228	break;
	229	case SNDRV_PCM_FORMAT_S20_3LE:
	230	iface \|= 0x0001;
	231	break;
	232	case SNDRV_PCM_FORMAT_S24_LE:
	233	iface \|= 0x0002;
	234	break;
	235	case SNDRV_PCM_FORMAT_S32_LE:
	236	iface \|= 0x0003;
	237	break;
	238	default:
	239	dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
	240	params_format(params));
	241	return -EINVAL;
	242	}
	243
	244	dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
	245	params_format(params));
	246
	247	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	248	return 0;
	249	}
	250
	251	static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	252	int clk_id, unsigned int freq, int dir)
	253	{
	254	struct snd_soc_codec *codec = codec_dai->codec;
	255	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40 IL	256
	257	dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
	258
3fe4a5ee IL	259	switch (freq) {
	260	case 11289600:
	261	wm8741->sysclk_constraints = &constraints_11289;
	262	wm8741->sysclk = freq;
	263	return 0;
	264
	265	case 12288000:
	266	wm8741->sysclk_constraints = &constraints_12288;
	267	wm8741->sysclk = freq;
	268	return 0;
	269
	270	case 16384000:
	271	wm8741->sysclk_constraints = &constraints_16384;
	272	wm8741->sysclk = freq;
	273	return 0;
	274
	275	case 16934400:
	276	wm8741->sysclk_constraints = &constraints_16934;
	277	wm8741->sysclk = freq;
	278	return 0;
	279
	280	case 18432000:
	281	wm8741->sysclk_constraints = &constraints_18432;
	282	wm8741->sysclk = freq;
	283	return 0;
	284
	285	case 22579200:
	286	case 33868800:
	287	wm8741->sysclk_constraints = &constraints_22579;
	288	wm8741->sysclk = freq;
	289	return 0;
	290
	291	case 24576000:
	292	wm8741->sysclk_constraints = &constraints_24576;
	293	wm8741->sysclk = freq;
	294	return 0;
	295
	296	case 36864000:
	297	wm8741->sysclk_constraints = &constraints_36864;
	298	wm8741->sysclk = freq;
	299	return 0;
992bee40	300	}
3fe4a5ee	301	return -EINVAL;
992bee40 IL	302	}
	303
	304	static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
	305	unsigned int fmt)
	306	{
	307	struct snd_soc_codec *codec = codec_dai->codec;
	308	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
	309
	310	/* check master/slave audio interface */
	311	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	312	case SND_SOC_DAIFMT_CBS_CFS:
	313	break;
	314	default:
	315	return -EINVAL;
	316	}
	317
	318	/* interface format */
	319	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	320	case SND_SOC_DAIFMT_I2S:
	321	iface \|= 0x0008;
	322	break;
	323	case SND_SOC_DAIFMT_RIGHT_J:
	324	break;
	325	case SND_SOC_DAIFMT_LEFT_J:
	326	iface \|= 0x0004;
	327	break;
	328	case SND_SOC_DAIFMT_DSP_A:
3a340104	329	iface \|= 0x000C;
992bee40 IL	330	break;
992bee40 IL	331	case SND_SOC_DAIFMT_DSP_B:
3a340104	332	iface \|= 0x001C;
992bee40 IL	333	break;
	334	default:
	335	return -EINVAL;
	336	}
	337
	338	/* clock inversion */
	339	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	340	case SND_SOC_DAIFMT_NB_NF:
	341	break;
	342	case SND_SOC_DAIFMT_IB_IF:
	343	iface \|= 0x0010;
	344	break;
	345	case SND_SOC_DAIFMT_IB_NF:
	346	iface \|= 0x0020;
	347	break;
	348	case SND_SOC_DAIFMT_NB_IF:
	349	iface \|= 0x0030;
	350	break;
	351	default:
	352	return -EINVAL;
	353	}
	354
	355
	356	dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
	357	fmt & SND_SOC_DAIFMT_FORMAT_MASK,
	358	((fmt & SND_SOC_DAIFMT_INV_MASK)));
	359
	360	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	361	return 0;
	362	}
	363
	364	#define WM8741_RATES (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	365	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| \
	366	SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_176400 \| \
	367	SNDRV_PCM_RATE_192000)
	368
	369	#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	370	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
	371
85e7652d	372	static const struct snd_soc_dai_ops wm8741_dai_ops = {
992bee40 IL	373	.startup = wm8741_startup,
	374	.hw_params = wm8741_hw_params,
	375	.set_sysclk = wm8741_set_dai_sysclk,
	376	.set_fmt = wm8741_set_dai_fmt,
	377	};
	378
f0fba2ad	379	static struct snd_soc_dai_driver wm8741_dai = {
30e2d368	380	.name = "wm8741",
992bee40 IL	381	.playback = {
	382	.stream_name = "Playback",
	383	.channels_min = 2, /* Mono modes not yet supported */
	384	.channels_max = 2,
	385	.rates = WM8741_RATES,
	386	.formats = WM8741_FORMATS,
	387	},
	388	.ops = &wm8741_dai_ops,
	389	};
992bee40 IL	390
992bee40 IL	391	#ifdef CONFIG_PM
f0fba2ad	392	static int wm8741_resume(struct snd_soc_codec *codec)
992bee40	393	{
df3431b7	394	snd_soc_cache_sync(codec);
992bee40 IL	395	return 0;
	396	}
	397	#else
	398	#define wm8741_suspend NULL
	399	#define wm8741_resume NULL
	400	#endif
	401
f0fba2ad	402	static int wm8741_probe(struct snd_soc_codec *codec)
992bee40	403	{
f0fba2ad	404	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40	405	int ret = 0;
398575db MB	406	int i;
	407
	408	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
	409	wm8741->supplies[i].supply = wm8741_supply_names[i];
	410
	411	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8741->supplies),
	412	wm8741->supplies);
	413	if (ret != 0) {
	414	dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
	415	goto err;
	416	}
	417
	418	ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
	419	wm8741->supplies);
	420	if (ret != 0) {
	421	dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
	422	goto err_get;
	423	}
992bee40	424
f0fba2ad LG	425	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8741->control_type);
	426	if (ret != 0) {
	427	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
398575db	428	goto err_enable;
992bee40 IL	429	}
992bee40 IL	430
f0fba2ad	431	ret = wm8741_reset(codec);
992bee40	432	if (ret < 0) {
f0fba2ad	433	dev_err(codec->dev, "Failed to issue reset\n");
398575db	434	goto err_enable;
992bee40 IL	435	}
992bee40 IL	436
f0fba2ad	437	/* Change some default settings - latch VU */
a1b3b5ee MB	438	snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
	439	WM8741_UPDATELL, WM8741_UPDATELL);
	440	snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
	441	WM8741_UPDATELM, WM8741_UPDATELM);
	442	snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
	443	WM8741_UPDATERL, WM8741_UPDATERL);
9b5999b1	444	snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
a1b3b5ee	445	WM8741_UPDATERM, WM8741_UPDATERM);
f0fba2ad	446
f0fba2ad	447	dev_dbg(codec->dev, "Successful registration\n");
992bee40	448	return ret;
398575db MB	449
	450	err_enable:
	451	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	452	err_get:
	453	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	454	err:
	455	return ret;
	456	}
	457
	458	static int wm8741_remove(struct snd_soc_codec *codec)
	459	{
	460	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	461
	462	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	463	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	464
	465	return 0;
992bee40 IL	466	}
992bee40 IL	467
f0fba2ad	468	static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
992bee40	469	.probe = wm8741_probe,
398575db	470	.remove = wm8741_remove,
992bee40	471	.resume = wm8741_resume,
e5eec34c	472	.reg_cache_size = ARRAY_SIZE(wm8741_reg_defaults),
f0fba2ad	473	.reg_word_size = sizeof(u16),
0aa34b16	474	.reg_cache_default = wm8741_reg_defaults,
0e62780f MB	475
	476	.controls = wm8741_snd_controls,
	477	.num_controls = ARRAY_SIZE(wm8741_snd_controls),
	478	.dapm_widgets = wm8741_dapm_widgets,
	479	.num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
	480	.dapm_routes = wm8741_dapm_routes,
	481	.num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
992bee40	482	};
992bee40	483
80080ec5 MB	484	static const struct of_device_id wm8741_of_match[] = {
	485	{ .compatible = "wlf,wm8741", },
	486	{ }
	487	};
	488	MODULE_DEVICE_TABLE(of, wm8741_of_match);
	489
f0fba2ad LG	490	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	491	static int wm8741_i2c_probe(struct i2c_client *i2c,
	492	const struct i2c_device_id *id)
992bee40	493	{
f0fba2ad	494	struct wm8741_priv *wm8741;
398575db	495	int ret;
992bee40	496
5aefb306 MB	497	wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
5aefb306 MB	498	GFP_KERNEL);
f0fba2ad LG	499	if (wm8741 == NULL)
f0fba2ad LG	500	return -ENOMEM;
992bee40	501
f0fba2ad	502	i2c_set_clientdata(i2c, wm8741);
f0fba2ad	503	wm8741->control_type = SND_SOC_I2C;
992bee40	504
398575db MB	505	ret = snd_soc_register_codec(&i2c->dev,
398575db MB	506	&soc_codec_dev_wm8741, &wm8741_dai, 1);
992bee40	507
992bee40 IL	508	return ret;
	509	}
	510
f0fba2ad	511	static int wm8741_i2c_remove(struct i2c_client *client)
992bee40	512	{
f0fba2ad	513	snd_soc_unregister_codec(&client->dev);
992bee40 IL	514	return 0;
	515	}
	516
	517	static const struct i2c_device_id wm8741_i2c_id[] = {
	518	{ "wm8741", 0 },
	519	{ }
	520	};
	521	MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
	522
992bee40 IL	523	static struct i2c_driver wm8741_i2c_driver = {
992bee40 IL	524	.driver = {
0473e61b	525	.name = "wm8741",
992bee40	526	.owner = THIS_MODULE,
80080ec5	527	.of_match_table = wm8741_of_match,
992bee40 IL	528	},
992bee40 IL	529	.probe = wm8741_i2c_probe,
f0fba2ad	530	.remove = wm8741_i2c_remove,
992bee40 IL	531	.id_table = wm8741_i2c_id,
	532	};
	533	#endif
	534
39e9b8d2 MB	535	#if defined(CONFIG_SPI_MASTER)
	536	static int __devinit wm8741_spi_probe(struct spi_device *spi)
	537	{
	538	struct wm8741_priv *wm8741;
	539	int ret;
	540
5aefb306 MB	541	wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
5aefb306 MB	542	GFP_KERNEL);
39e9b8d2 MB	543	if (wm8741 == NULL)
	544	return -ENOMEM;
	545
	546	wm8741->control_type = SND_SOC_SPI;
	547	spi_set_drvdata(spi, wm8741);
	548
	549	ret = snd_soc_register_codec(&spi->dev,
	550	&soc_codec_dev_wm8741, &wm8741_dai, 1);
39e9b8d2 MB	551	return ret;
	552	}
	553
	554	static int __devexit wm8741_spi_remove(struct spi_device *spi)
	555	{
	556	snd_soc_unregister_codec(&spi->dev);
39e9b8d2 MB	557	return 0;
	558	}
	559
	560	static struct spi_driver wm8741_spi_driver = {
	561	.driver = {
	562	.name = "wm8741",
	563	.owner = THIS_MODULE,
80080ec5	564	.of_match_table = wm8741_of_match,
39e9b8d2 MB	565	},
	566	.probe = wm8741_spi_probe,
	567	.remove = __devexit_p(wm8741_spi_remove),
	568	};
	569	#endif /* CONFIG_SPI_MASTER */
	570
992bee40 IL	571	static int __init wm8741_modinit(void)
992bee40 IL	572	{
f0fba2ad LG	573	int ret = 0;
f0fba2ad LG	574
992bee40 IL	575	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
992bee40 IL	576	ret = i2c_add_driver(&wm8741_i2c_driver);
3fe4a5ee	577	if (ret != 0)
f0fba2ad	578	pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
992bee40	579	#endif
39e9b8d2 MB	580	#if defined(CONFIG_SPI_MASTER)
	581	ret = spi_register_driver(&wm8741_spi_driver);
	582	if (ret != 0) {
	583	printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
	584	ret);
	585	}
	586	#endif
f0fba2ad LG	587
f0fba2ad LG	588	return ret;
992bee40 IL	589	}
	590	module_init(wm8741_modinit);
	591
	592	static void __exit wm8741_exit(void)
	593	{
39e9b8d2 MB	594	#if defined(CONFIG_SPI_MASTER)
	595	spi_unregister_driver(&wm8741_spi_driver);
	596	#endif
992bee40 IL	597	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	598	i2c_del_driver(&wm8741_i2c_driver);
	599	#endif
	600	}
	601	module_exit(wm8741_exit);
	602
	603	MODULE_DESCRIPTION("ASoC WM8741 driver");
	604	MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
	605	MODULE_LICENSE("GPL");