[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/platform_device.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 intercon[] = {
	{ "VOUTLP", NULL, "DACL" },
	{ "VOUTLN", NULL, "DACL" },
	{ "VOUTRP", NULL, "DACR" },
	{ "VOUTRN", NULL, "DACR" },
};

static int wm8741_add_widgets(struct snd_soc_codec *codec)
{
	struct snd_soc_dapm_context *dapm = &codec->dapm;

	snd_soc_dapm_new_controls(dapm, wm8741_dapm_widgets,
				  ARRAY_SIZE(wm8741_dapm_widgets));
	snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));

	return 0;
}

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_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->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 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);

	snd_soc_add_controls(codec, wm8741_snd_controls,
			     ARRAY_SIZE(wm8741_snd_controls));
	wm8741_add_widgets(codec);

	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,
};

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 = kzalloc(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);
	if (ret != 0)
		goto err;

	return ret;

err:
	kfree(wm8741);
	return ret;
}

static int wm8741_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	kfree(i2c_get_clientdata(client));
	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 = kzalloc(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);
	if (ret < 0)
		kfree(wm8741);
	return ret;
}

static int __devexit wm8741_spi_remove(struct spi_device *spi)
{
	snd_soc_unregister_codec(&spi->dev);
	kfree(spi_get_drvdata(spi));
	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/platform_device.h>
	22	#include <linux/regulator/consumer.h>
	23	#include <linux/slab.h>
80080ec5	24	#include <linux/of_device.h>
992bee40 IL	25	#include <sound/core.h>
	26	#include <sound/pcm.h>
	27	#include <sound/pcm_params.h>
	28	#include <sound/soc.h>
992bee40 IL	29	#include <sound/initval.h>
	30	#include <sound/tlv.h>
	31
	32	#include "wm8741.h"
	33
992bee40 IL	34	#define WM8741_NUM_SUPPLIES 2
	35	static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
	36	"AVDD",
	37	"DVDD",
	38	};
	39
3fe4a5ee	40	#define WM8741_NUM_RATES 6
992bee40 IL	41
	42	/* codec private data */
	43	struct wm8741_priv {
f0fba2ad	44	enum snd_soc_control_type control_type;
992bee40 IL	45	struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
992bee40 IL	46	unsigned int sysclk;
3fe4a5ee	47	struct snd_pcm_hw_constraint_list *sysclk_constraints;
992bee40 IL	48	};
	49
	50	static const u16 wm8741_reg_defaults[WM8741_REGISTER_COUNT] = {
	51	0x0000, /* R0 - DACLLSB Attenuation */
	52	0x0000, /* R1 - DACLMSB Attenuation */
	53	0x0000, /* R2 - DACRLSB Attenuation */
	54	0x0000, /* R3 - DACRMSB Attenuation */
	55	0x0000, /* R4 - Volume Control */
	56	0x000A, /* R5 - Format Control */
	57	0x0000, /* R6 - Filter Control */
	58	0x0000, /* R7 - Mode Control 1 */
	59	0x0002, /* R8 - Mode Control 2 */
	60	0x0000, /* R9 - Reset */
	61	0x0002, /* R32 - ADDITONAL_CONTROL_1 */
	62	};
	63
	64
	65	static int wm8741_reset(struct snd_soc_codec *codec)
	66	{
	67	return snd_soc_write(codec, WM8741_RESET, 0);
	68	}
	69
	70	static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
	71	static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
	72
	73	static const struct snd_kcontrol_new wm8741_snd_controls[] = {
	74	SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
	75	WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
	76	SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
	77	WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
	78	};
	79
	80	static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
	81	SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
	82	SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
	83	SND_SOC_DAPM_OUTPUT("VOUTLP"),
	84	SND_SOC_DAPM_OUTPUT("VOUTLN"),
	85	SND_SOC_DAPM_OUTPUT("VOUTRP"),
	86	SND_SOC_DAPM_OUTPUT("VOUTRN"),
	87	};
	88
	89	static const struct snd_soc_dapm_route intercon[] = {
	90	{ "VOUTLP", NULL, "DACL" },
	91	{ "VOUTLN", NULL, "DACL" },
	92	{ "VOUTRP", NULL, "DACR" },
	93	{ "VOUTRN", NULL, "DACR" },
	94	};
	95
	96	static int wm8741_add_widgets(struct snd_soc_codec *codec)
	97	{
ce6120cc	98	struct snd_soc_dapm_context *dapm = &codec->dapm;
992bee40	99
ce6120cc LG	100	snd_soc_dapm_new_controls(dapm, wm8741_dapm_widgets,
	101	ARRAY_SIZE(wm8741_dapm_widgets));
	102	snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
992bee40 IL	103
	104	return 0;
	105	}
	106
	107	static struct {
	108	int value;
	109	int ratio;
	110	} lrclk_ratios[WM8741_NUM_RATES] = {
3fe4a5ee IL	111	{ 1, 128 },
	112	{ 2, 192 },
	113	{ 3, 256 },
	114	{ 4, 384 },
	115	{ 5, 512 },
	116	{ 6, 768 },
	117	};
	118
	119	static unsigned int rates_11289[] = {
	120	44100, 88235,
	121	};
	122
	123	static struct snd_pcm_hw_constraint_list constraints_11289 = {
	124	.count = ARRAY_SIZE(rates_11289),
	125	.list = rates_11289,
	126	};
	127
	128	static unsigned int rates_12288[] = {
	129	32000, 48000, 96000,
	130	};
	131
	132	static struct snd_pcm_hw_constraint_list constraints_12288 = {
	133	.count = ARRAY_SIZE(rates_12288),
	134	.list = rates_12288,
	135	};
	136
	137	static unsigned int rates_16384[] = {
	138	32000,
	139	};
	140
	141	static struct snd_pcm_hw_constraint_list constraints_16384 = {
	142	.count = ARRAY_SIZE(rates_16384),
	143	.list = rates_16384,
	144	};
	145
	146	static unsigned int rates_16934[] = {
	147	44100, 88235,
	148	};
	149
	150	static struct snd_pcm_hw_constraint_list constraints_16934 = {
	151	.count = ARRAY_SIZE(rates_16934),
	152	.list = rates_16934,
	153	};
	154
	155	static unsigned int rates_18432[] = {
	156	48000, 96000,
	157	};
	158
	159	static struct snd_pcm_hw_constraint_list constraints_18432 = {
	160	.count = ARRAY_SIZE(rates_18432),
	161	.list = rates_18432,
	162	};
	163
	164	static unsigned int rates_22579[] = {
	165	44100, 88235, 1764000
	166	};
	167
	168	static struct snd_pcm_hw_constraint_list constraints_22579 = {
	169	.count = ARRAY_SIZE(rates_22579),
	170	.list = rates_22579,
	171	};
	172
	173	static unsigned int rates_24576[] = {
	174	32000, 48000, 96000, 192000
175	};
176
177	static struct snd_pcm_hw_constraint_list constraints_24576 = {
178	.count = ARRAY_SIZE(rates_24576),
179	.list = rates_24576,
180	};
181
182	static unsigned int rates_36864[] = {
183	48000, 96000, 19200
184	};
185
186	static struct snd_pcm_hw_constraint_list constraints_36864 = {
187	.count = ARRAY_SIZE(rates_36864),
188	.list = rates_36864,
992bee40 IL	189	};
	190
	191
	192	static int wm8741_startup(struct snd_pcm_substream *substream,
	193	struct snd_soc_dai *dai)
	194	{
	195	struct snd_soc_codec *codec = dai->codec;
	196	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	197
	198	/* The set of sample rates that can be supported depends on the
	199	* MCLK supplied to the CODEC - enforce this.
	200	*/
	201	if (!wm8741->sysclk) {
	202	dev_err(codec->dev,
	203	"No MCLK configured, call set_sysclk() on init\n");
	204	return -EINVAL;
	205	}
	206
	207	snd_pcm_hw_constraint_list(substream->runtime, 0,
	208	SNDRV_PCM_HW_PARAM_RATE,
3fe4a5ee	209	wm8741->sysclk_constraints);
992bee40 IL	210
	211	return 0;
	212	}
	213
	214	static int wm8741_hw_params(struct snd_pcm_substream *substream,
	215	struct snd_pcm_hw_params *params,
	216	struct snd_soc_dai *dai)
	217	{
	218	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	219	struct snd_soc_codec *codec = rtd->codec;
992bee40 IL	220	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	221	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
	222	int i;
	223
	224	/* Find a supported LRCLK ratio */
	225	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
	226	if (wm8741->sysclk / params_rate(params) ==
	227	lrclk_ratios[i].ratio)
	228	break;
	229	}
	230
	231	/* Should never happen, should be handled by constraints */
	232	if (i == ARRAY_SIZE(lrclk_ratios)) {
	233	dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
	234	wm8741->sysclk / params_rate(params));
	235	return -EINVAL;
	236	}
	237
	238	/* bit size */
	239	switch (params_format(params)) {
	240	case SNDRV_PCM_FORMAT_S16_LE:
	241	break;
	242	case SNDRV_PCM_FORMAT_S20_3LE:
	243	iface \|= 0x0001;
	244	break;
	245	case SNDRV_PCM_FORMAT_S24_LE:
	246	iface \|= 0x0002;
	247	break;
	248	case SNDRV_PCM_FORMAT_S32_LE:
	249	iface \|= 0x0003;
	250	break;
	251	default:
	252	dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
	253	params_format(params));
	254	return -EINVAL;
	255	}
	256
	257	dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
	258	params_format(params));
	259
	260	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	261	return 0;
	262	}
	263
	264	static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	265	int clk_id, unsigned int freq, int dir)
	266	{
	267	struct snd_soc_codec *codec = codec_dai->codec;
	268	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40 IL	269
	270	dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
	271
3fe4a5ee IL	272	switch (freq) {
	273	case 11289600:
	274	wm8741->sysclk_constraints = &constraints_11289;
	275	wm8741->sysclk = freq;
	276	return 0;
	277
	278	case 12288000:
	279	wm8741->sysclk_constraints = &constraints_12288;
	280	wm8741->sysclk = freq;
	281	return 0;
	282
	283	case 16384000:
	284	wm8741->sysclk_constraints = &constraints_16384;
	285	wm8741->sysclk = freq;
	286	return 0;
	287
	288	case 16934400:
	289	wm8741->sysclk_constraints = &constraints_16934;
	290	wm8741->sysclk = freq;
	291	return 0;
	292
	293	case 18432000:
	294	wm8741->sysclk_constraints = &constraints_18432;
	295	wm8741->sysclk = freq;
	296	return 0;
	297
	298	case 22579200:
	299	case 33868800:
	300	wm8741->sysclk_constraints = &constraints_22579;
	301	wm8741->sysclk = freq;
	302	return 0;
	303
	304	case 24576000:
	305	wm8741->sysclk_constraints = &constraints_24576;
	306	wm8741->sysclk = freq;
	307	return 0;
	308
	309	case 36864000:
	310	wm8741->sysclk_constraints = &constraints_36864;
	311	wm8741->sysclk = freq;
	312	return 0;
992bee40	313	}
3fe4a5ee	314	return -EINVAL;
992bee40 IL	315	}
	316
	317	static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
	318	unsigned int fmt)
	319	{
	320	struct snd_soc_codec *codec = codec_dai->codec;
	321	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
	322
	323	/* check master/slave audio interface */
	324	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	325	case SND_SOC_DAIFMT_CBS_CFS:
	326	break;
	327	default:
	328	return -EINVAL;
	329	}
	330
	331	/* interface format */
	332	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	333	case SND_SOC_DAIFMT_I2S:
	334	iface \|= 0x0008;
	335	break;
	336	case SND_SOC_DAIFMT_RIGHT_J:
	337	break;
	338	case SND_SOC_DAIFMT_LEFT_J:
	339	iface \|= 0x0004;
	340	break;
	341	case SND_SOC_DAIFMT_DSP_A:
3a340104	342	iface \|= 0x000C;
992bee40 IL	343	break;
992bee40 IL	344	case SND_SOC_DAIFMT_DSP_B:
3a340104	345	iface \|= 0x001C;
992bee40 IL	346	break;
	347	default:
	348	return -EINVAL;
	349	}
	350
	351	/* clock inversion */
	352	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	353	case SND_SOC_DAIFMT_NB_NF:
	354	break;
	355	case SND_SOC_DAIFMT_IB_IF:
	356	iface \|= 0x0010;
	357	break;
	358	case SND_SOC_DAIFMT_IB_NF:
	359	iface \|= 0x0020;
	360	break;
	361	case SND_SOC_DAIFMT_NB_IF:
	362	iface \|= 0x0030;
	363	break;
	364	default:
	365	return -EINVAL;
	366	}
	367
	368
	369	dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
	370	fmt & SND_SOC_DAIFMT_FORMAT_MASK,
	371	((fmt & SND_SOC_DAIFMT_INV_MASK)));
	372
	373	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	374	return 0;
	375	}
	376
	377	#define WM8741_RATES (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	378	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| \
	379	SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_176400 \| \
	380	SNDRV_PCM_RATE_192000)
	381
	382	#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	383	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
	384
	385	static struct snd_soc_dai_ops wm8741_dai_ops = {
	386	.startup = wm8741_startup,
	387	.hw_params = wm8741_hw_params,
	388	.set_sysclk = wm8741_set_dai_sysclk,
	389	.set_fmt = wm8741_set_dai_fmt,
	390	};
	391
f0fba2ad	392	static struct snd_soc_dai_driver wm8741_dai = {
30e2d368	393	.name = "wm8741",
992bee40 IL	394	.playback = {
	395	.stream_name = "Playback",
	396	.channels_min = 2, /* Mono modes not yet supported */
	397	.channels_max = 2,
	398	.rates = WM8741_RATES,
	399	.formats = WM8741_FORMATS,
	400	},
	401	.ops = &wm8741_dai_ops,
	402	};
992bee40 IL	403
992bee40 IL	404	#ifdef CONFIG_PM
f0fba2ad	405	static int wm8741_resume(struct snd_soc_codec *codec)
992bee40	406	{
df3431b7	407	snd_soc_cache_sync(codec);
992bee40 IL	408	return 0;
	409	}
	410	#else
	411	#define wm8741_suspend NULL
	412	#define wm8741_resume NULL
	413	#endif
	414
f0fba2ad	415	static int wm8741_probe(struct snd_soc_codec *codec)
992bee40	416	{
f0fba2ad	417	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40	418	int ret = 0;
398575db MB	419	int i;
	420
	421	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
	422	wm8741->supplies[i].supply = wm8741_supply_names[i];
	423
	424	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8741->supplies),
	425	wm8741->supplies);
	426	if (ret != 0) {
	427	dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
	428	goto err;
	429	}
	430
	431	ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
	432	wm8741->supplies);
	433	if (ret != 0) {
	434	dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
	435	goto err_get;
	436	}
992bee40	437
f0fba2ad LG	438	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8741->control_type);
	439	if (ret != 0) {
	440	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
398575db	441	goto err_enable;
992bee40 IL	442	}
992bee40 IL	443
f0fba2ad	444	ret = wm8741_reset(codec);
992bee40	445	if (ret < 0) {
f0fba2ad	446	dev_err(codec->dev, "Failed to issue reset\n");
398575db	447	goto err_enable;
992bee40 IL	448	}
992bee40 IL	449
f0fba2ad	450	/* Change some default settings - latch VU */
a1b3b5ee MB	451	snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
	452	WM8741_UPDATELL, WM8741_UPDATELL);
	453	snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
	454	WM8741_UPDATELM, WM8741_UPDATELM);
	455	snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
	456	WM8741_UPDATERL, WM8741_UPDATERL);
9b5999b1	457	snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
a1b3b5ee	458	WM8741_UPDATERM, WM8741_UPDATERM);
f0fba2ad	459
992bee40 IL	460	snd_soc_add_controls(codec, wm8741_snd_controls,
	461	ARRAY_SIZE(wm8741_snd_controls));
	462	wm8741_add_widgets(codec);
	463
f0fba2ad	464	dev_dbg(codec->dev, "Successful registration\n");
992bee40	465	return ret;
398575db MB	466
	467	err_enable:
	468	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	469	err_get:
	470	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	471	err:
	472	return ret;
	473	}
	474
	475	static int wm8741_remove(struct snd_soc_codec *codec)
	476	{
	477	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	478
	479	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	480	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	481
	482	return 0;
992bee40 IL	483	}
992bee40 IL	484
f0fba2ad	485	static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
992bee40	486	.probe = wm8741_probe,
398575db	487	.remove = wm8741_remove,
992bee40	488	.resume = wm8741_resume,
e5eec34c	489	.reg_cache_size = ARRAY_SIZE(wm8741_reg_defaults),
f0fba2ad	490	.reg_word_size = sizeof(u16),
0aa34b16	491	.reg_cache_default = wm8741_reg_defaults,
992bee40	492	};
992bee40	493
80080ec5 MB	494	static const struct of_device_id wm8741_of_match[] = {
	495	{ .compatible = "wlf,wm8741", },
	496	{ }
	497	};
	498	MODULE_DEVICE_TABLE(of, wm8741_of_match);
	499
f0fba2ad LG	500	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	501	static int wm8741_i2c_probe(struct i2c_client *i2c,
	502	const struct i2c_device_id *id)
992bee40	503	{
f0fba2ad	504	struct wm8741_priv *wm8741;
398575db	505	int ret;
992bee40	506
f0fba2ad LG	507	wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL);
	508	if (wm8741 == NULL)
	509	return -ENOMEM;
992bee40	510
f0fba2ad	511	i2c_set_clientdata(i2c, wm8741);
f0fba2ad	512	wm8741->control_type = SND_SOC_I2C;
992bee40	513
398575db MB	514	ret = snd_soc_register_codec(&i2c->dev,
	515	&soc_codec_dev_wm8741, &wm8741_dai, 1);
	516	if (ret != 0)
	517	goto err;
992bee40	518
398575db	519	return ret;
992bee40	520
992bee40 IL	521	err:
	522	kfree(wm8741);
	523	return ret;
	524	}
	525
f0fba2ad	526	static int wm8741_i2c_remove(struct i2c_client *client)
992bee40	527	{
f0fba2ad	528	snd_soc_unregister_codec(&client->dev);
f0fba2ad	529	kfree(i2c_get_clientdata(client));
992bee40 IL	530	return 0;
	531	}
	532
	533	static const struct i2c_device_id wm8741_i2c_id[] = {
	534	{ "wm8741", 0 },
	535	{ }
	536	};
	537	MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
	538
992bee40 IL	539	static struct i2c_driver wm8741_i2c_driver = {
992bee40 IL	540	.driver = {
0473e61b	541	.name = "wm8741",
992bee40	542	.owner = THIS_MODULE,
80080ec5	543	.of_match_table = wm8741_of_match,
992bee40 IL	544	},
992bee40 IL	545	.probe = wm8741_i2c_probe,
f0fba2ad	546	.remove = wm8741_i2c_remove,
992bee40 IL	547	.id_table = wm8741_i2c_id,
	548	};
	549	#endif
	550
39e9b8d2 MB	551	#if defined(CONFIG_SPI_MASTER)
	552	static int __devinit wm8741_spi_probe(struct spi_device *spi)
	553	{
	554	struct wm8741_priv *wm8741;
	555	int ret;
	556
	557	wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL);
	558	if (wm8741 == NULL)
	559	return -ENOMEM;
	560
	561	wm8741->control_type = SND_SOC_SPI;
	562	spi_set_drvdata(spi, wm8741);
	563
	564	ret = snd_soc_register_codec(&spi->dev,
	565	&soc_codec_dev_wm8741, &wm8741_dai, 1);
	566	if (ret < 0)
	567	kfree(wm8741);
	568	return ret;
	569	}
	570
	571	static int __devexit wm8741_spi_remove(struct spi_device *spi)
	572	{
	573	snd_soc_unregister_codec(&spi->dev);
	574	kfree(spi_get_drvdata(spi));
	575	return 0;
	576	}
	577
	578	static struct spi_driver wm8741_spi_driver = {
	579	.driver = {
	580	.name = "wm8741",
	581	.owner = THIS_MODULE,
80080ec5	582	.of_match_table = wm8741_of_match,
39e9b8d2 MB	583	},
	584	.probe = wm8741_spi_probe,
	585	.remove = __devexit_p(wm8741_spi_remove),
	586	};
	587	#endif /* CONFIG_SPI_MASTER */
	588
992bee40 IL	589	static int __init wm8741_modinit(void)
992bee40 IL	590	{
f0fba2ad LG	591	int ret = 0;
f0fba2ad LG	592
992bee40 IL	593	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
992bee40 IL	594	ret = i2c_add_driver(&wm8741_i2c_driver);
3fe4a5ee	595	if (ret != 0)
f0fba2ad	596	pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
992bee40	597	#endif
39e9b8d2 MB	598	#if defined(CONFIG_SPI_MASTER)
	599	ret = spi_register_driver(&wm8741_spi_driver);
	600	if (ret != 0) {
	601	printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
	602	ret);
	603	}
	604	#endif
f0fba2ad LG	605
f0fba2ad LG	606	return ret;
992bee40 IL	607	}
	608	module_init(wm8741_modinit);
	609
	610	static void __exit wm8741_exit(void)
	611	{
39e9b8d2 MB	612	#if defined(CONFIG_SPI_MASTER)
	613	spi_unregister_driver(&wm8741_spi_driver);
	614	#endif
992bee40 IL	615	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	616	i2c_del_driver(&wm8741_i2c_driver);
	617	#endif
	618	}
	619	module_exit(wm8741_exit);
	620
	621	MODULE_DESCRIPTION("ASoC WM8741 driver");
	622	MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
	623	MODULE_LICENSE("GPL");