[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 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 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);

	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 = 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
	88	static const struct snd_soc_dapm_route intercon[] = {
	89	{ "VOUTLP", NULL, "DACL" },
	90	{ "VOUTLN", NULL, "DACL" },
	91	{ "VOUTRP", NULL, "DACR" },
	92	{ "VOUTRN", NULL, "DACR" },
	93	};
	94
	95	static int wm8741_add_widgets(struct snd_soc_codec *codec)
	96	{
ce6120cc	97	struct snd_soc_dapm_context *dapm = &codec->dapm;
992bee40	98
ce6120cc LG	99	snd_soc_dapm_new_controls(dapm, wm8741_dapm_widgets,
	100	ARRAY_SIZE(wm8741_dapm_widgets));
	101	snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
992bee40 IL	102
	103	return 0;
	104	}
	105
	106	static struct {
	107	int value;
	108	int ratio;
	109	} lrclk_ratios[WM8741_NUM_RATES] = {
3fe4a5ee IL	110	{ 1, 128 },
	111	{ 2, 192 },
	112	{ 3, 256 },
	113	{ 4, 384 },
	114	{ 5, 512 },
	115	{ 6, 768 },
	116	};
	117
	118	static unsigned int rates_11289[] = {
	119	44100, 88235,
	120	};
	121
	122	static struct snd_pcm_hw_constraint_list constraints_11289 = {
	123	.count = ARRAY_SIZE(rates_11289),
	124	.list = rates_11289,
	125	};
	126
	127	static unsigned int rates_12288[] = {
	128	32000, 48000, 96000,
	129	};
	130
	131	static struct snd_pcm_hw_constraint_list constraints_12288 = {
	132	.count = ARRAY_SIZE(rates_12288),
	133	.list = rates_12288,
	134	};
	135
	136	static unsigned int rates_16384[] = {
	137	32000,
	138	};
	139
	140	static struct snd_pcm_hw_constraint_list constraints_16384 = {
	141	.count = ARRAY_SIZE(rates_16384),
	142	.list = rates_16384,
	143	};
	144
	145	static unsigned int rates_16934[] = {
	146	44100, 88235,
	147	};
	148
	149	static struct snd_pcm_hw_constraint_list constraints_16934 = {
	150	.count = ARRAY_SIZE(rates_16934),
	151	.list = rates_16934,
	152	};
	153
	154	static unsigned int rates_18432[] = {
	155	48000, 96000,
	156	};
	157
	158	static struct snd_pcm_hw_constraint_list constraints_18432 = {
	159	.count = ARRAY_SIZE(rates_18432),
	160	.list = rates_18432,
	161	};
	162
	163	static unsigned int rates_22579[] = {
	164	44100, 88235, 1764000
	165	};
	166
	167	static struct snd_pcm_hw_constraint_list constraints_22579 = {
	168	.count = ARRAY_SIZE(rates_22579),
	169	.list = rates_22579,
	170	};
	171
	172	static unsigned int rates_24576[] = {
	173	32000, 48000, 96000, 192000
174	};
175
176	static struct snd_pcm_hw_constraint_list constraints_24576 = {
177	.count = ARRAY_SIZE(rates_24576),
178	.list = rates_24576,
179	};
180
181	static unsigned int rates_36864[] = {
182	48000, 96000, 19200
183	};
184
185	static struct snd_pcm_hw_constraint_list constraints_36864 = {
186	.count = ARRAY_SIZE(rates_36864),
187	.list = rates_36864,
992bee40 IL	188	};
	189
	190
	191	static int wm8741_startup(struct snd_pcm_substream *substream,
	192	struct snd_soc_dai *dai)
	193	{
	194	struct snd_soc_codec *codec = dai->codec;
	195	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	196
	197	/* The set of sample rates that can be supported depends on the
	198	* MCLK supplied to the CODEC - enforce this.
	199	*/
	200	if (!wm8741->sysclk) {
	201	dev_err(codec->dev,
	202	"No MCLK configured, call set_sysclk() on init\n");
	203	return -EINVAL;
	204	}
	205
	206	snd_pcm_hw_constraint_list(substream->runtime, 0,
	207	SNDRV_PCM_HW_PARAM_RATE,
3fe4a5ee	208	wm8741->sysclk_constraints);
992bee40 IL	209
	210	return 0;
	211	}
	212
	213	static int wm8741_hw_params(struct snd_pcm_substream *substream,
	214	struct snd_pcm_hw_params *params,
	215	struct snd_soc_dai *dai)
	216	{
	217	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	218	struct snd_soc_codec *codec = rtd->codec;
992bee40 IL	219	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	220	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
	221	int i;
	222
	223	/* Find a supported LRCLK ratio */
	224	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
	225	if (wm8741->sysclk / params_rate(params) ==
	226	lrclk_ratios[i].ratio)
	227	break;
	228	}
	229
	230	/* Should never happen, should be handled by constraints */
	231	if (i == ARRAY_SIZE(lrclk_ratios)) {
	232	dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
	233	wm8741->sysclk / params_rate(params));
	234	return -EINVAL;
	235	}
	236
	237	/* bit size */
	238	switch (params_format(params)) {
	239	case SNDRV_PCM_FORMAT_S16_LE:
	240	break;
	241	case SNDRV_PCM_FORMAT_S20_3LE:
	242	iface \|= 0x0001;
	243	break;
	244	case SNDRV_PCM_FORMAT_S24_LE:
	245	iface \|= 0x0002;
	246	break;
	247	case SNDRV_PCM_FORMAT_S32_LE:
	248	iface \|= 0x0003;
	249	break;
	250	default:
	251	dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
	252	params_format(params));
	253	return -EINVAL;
	254	}
	255
	256	dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
	257	params_format(params));
	258
	259	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	260	return 0;
	261	}
	262
	263	static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	264	int clk_id, unsigned int freq, int dir)
	265	{
	266	struct snd_soc_codec *codec = codec_dai->codec;
	267	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40 IL	268
	269	dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
	270
3fe4a5ee IL	271	switch (freq) {
	272	case 11289600:
	273	wm8741->sysclk_constraints = &constraints_11289;
	274	wm8741->sysclk = freq;
	275	return 0;
	276
	277	case 12288000:
	278	wm8741->sysclk_constraints = &constraints_12288;
	279	wm8741->sysclk = freq;
	280	return 0;
	281
	282	case 16384000:
	283	wm8741->sysclk_constraints = &constraints_16384;
	284	wm8741->sysclk = freq;
	285	return 0;
	286
	287	case 16934400:
	288	wm8741->sysclk_constraints = &constraints_16934;
	289	wm8741->sysclk = freq;
	290	return 0;
	291
	292	case 18432000:
	293	wm8741->sysclk_constraints = &constraints_18432;
	294	wm8741->sysclk = freq;
	295	return 0;
	296
	297	case 22579200:
	298	case 33868800:
	299	wm8741->sysclk_constraints = &constraints_22579;
	300	wm8741->sysclk = freq;
	301	return 0;
	302
	303	case 24576000:
	304	wm8741->sysclk_constraints = &constraints_24576;
	305	wm8741->sysclk = freq;
	306	return 0;
	307
	308	case 36864000:
	309	wm8741->sysclk_constraints = &constraints_36864;
	310	wm8741->sysclk = freq;
	311	return 0;
992bee40	312	}
3fe4a5ee	313	return -EINVAL;
992bee40 IL	314	}
	315
	316	static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
	317	unsigned int fmt)
	318	{
	319	struct snd_soc_codec *codec = codec_dai->codec;
	320	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
	321
	322	/* check master/slave audio interface */
	323	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	324	case SND_SOC_DAIFMT_CBS_CFS:
	325	break;
	326	default:
	327	return -EINVAL;
	328	}
	329
	330	/* interface format */
	331	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	332	case SND_SOC_DAIFMT_I2S:
	333	iface \|= 0x0008;
	334	break;
	335	case SND_SOC_DAIFMT_RIGHT_J:
	336	break;
	337	case SND_SOC_DAIFMT_LEFT_J:
	338	iface \|= 0x0004;
	339	break;
	340	case SND_SOC_DAIFMT_DSP_A:
3a340104	341	iface \|= 0x000C;
992bee40 IL	342	break;
992bee40 IL	343	case SND_SOC_DAIFMT_DSP_B:
3a340104	344	iface \|= 0x001C;
992bee40 IL	345	break;
	346	default:
	347	return -EINVAL;
	348	}
	349
	350	/* clock inversion */
	351	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	352	case SND_SOC_DAIFMT_NB_NF:
	353	break;
	354	case SND_SOC_DAIFMT_IB_IF:
	355	iface \|= 0x0010;
	356	break;
	357	case SND_SOC_DAIFMT_IB_NF:
	358	iface \|= 0x0020;
	359	break;
	360	case SND_SOC_DAIFMT_NB_IF:
	361	iface \|= 0x0030;
	362	break;
	363	default:
	364	return -EINVAL;
	365	}
	366
	367
	368	dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
	369	fmt & SND_SOC_DAIFMT_FORMAT_MASK,
	370	((fmt & SND_SOC_DAIFMT_INV_MASK)));
	371
	372	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	373	return 0;
	374	}
	375
	376	#define WM8741_RATES (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	377	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| \
	378	SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_176400 \| \
	379	SNDRV_PCM_RATE_192000)
	380
	381	#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	382	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
	383
85e7652d	384	static const struct snd_soc_dai_ops wm8741_dai_ops = {
992bee40 IL	385	.startup = wm8741_startup,
	386	.hw_params = wm8741_hw_params,
	387	.set_sysclk = wm8741_set_dai_sysclk,
	388	.set_fmt = wm8741_set_dai_fmt,
	389	};
	390
f0fba2ad	391	static struct snd_soc_dai_driver wm8741_dai = {
30e2d368	392	.name = "wm8741",
992bee40 IL	393	.playback = {
	394	.stream_name = "Playback",
	395	.channels_min = 2, /* Mono modes not yet supported */
	396	.channels_max = 2,
	397	.rates = WM8741_RATES,
	398	.formats = WM8741_FORMATS,
	399	},
	400	.ops = &wm8741_dai_ops,
	401	};
992bee40 IL	402
992bee40 IL	403	#ifdef CONFIG_PM
f0fba2ad	404	static int wm8741_resume(struct snd_soc_codec *codec)
992bee40	405	{
df3431b7	406	snd_soc_cache_sync(codec);
992bee40 IL	407	return 0;
	408	}
	409	#else
	410	#define wm8741_suspend NULL
	411	#define wm8741_resume NULL
	412	#endif
	413
f0fba2ad	414	static int wm8741_probe(struct snd_soc_codec *codec)
992bee40	415	{
f0fba2ad	416	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40	417	int ret = 0;
398575db MB	418	int i;
	419
	420	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
	421	wm8741->supplies[i].supply = wm8741_supply_names[i];
	422
	423	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8741->supplies),
	424	wm8741->supplies);
	425	if (ret != 0) {
	426	dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
	427	goto err;
	428	}
	429
	430	ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
	431	wm8741->supplies);
	432	if (ret != 0) {
	433	dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
	434	goto err_get;
	435	}
992bee40	436
f0fba2ad LG	437	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8741->control_type);
	438	if (ret != 0) {
	439	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
398575db	440	goto err_enable;
992bee40 IL	441	}
992bee40 IL	442
f0fba2ad	443	ret = wm8741_reset(codec);
992bee40	444	if (ret < 0) {
f0fba2ad	445	dev_err(codec->dev, "Failed to issue reset\n");
398575db	446	goto err_enable;
992bee40 IL	447	}
992bee40 IL	448
f0fba2ad	449	/* Change some default settings - latch VU */
a1b3b5ee MB	450	snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
	451	WM8741_UPDATELL, WM8741_UPDATELL);
	452	snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
	453	WM8741_UPDATELM, WM8741_UPDATELM);
	454	snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
	455	WM8741_UPDATERL, WM8741_UPDATERL);
9b5999b1	456	snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
a1b3b5ee	457	WM8741_UPDATERM, WM8741_UPDATERM);
f0fba2ad	458
992bee40 IL	459	snd_soc_add_controls(codec, wm8741_snd_controls,
	460	ARRAY_SIZE(wm8741_snd_controls));
	461	wm8741_add_widgets(codec);
	462
f0fba2ad	463	dev_dbg(codec->dev, "Successful registration\n");
992bee40	464	return ret;
398575db MB	465
	466	err_enable:
	467	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	468	err_get:
	469	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	470	err:
	471	return ret;
	472	}
	473
	474	static int wm8741_remove(struct snd_soc_codec *codec)
	475	{
	476	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	477
	478	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	479	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	480
	481	return 0;
992bee40 IL	482	}
992bee40 IL	483
f0fba2ad	484	static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
992bee40	485	.probe = wm8741_probe,
398575db	486	.remove = wm8741_remove,
992bee40	487	.resume = wm8741_resume,
e5eec34c	488	.reg_cache_size = ARRAY_SIZE(wm8741_reg_defaults),
f0fba2ad	489	.reg_word_size = sizeof(u16),
0aa34b16	490	.reg_cache_default = wm8741_reg_defaults,
992bee40	491	};
992bee40	492
80080ec5 MB	493	static const struct of_device_id wm8741_of_match[] = {
	494	{ .compatible = "wlf,wm8741", },
	495	{ }
	496	};
	497	MODULE_DEVICE_TABLE(of, wm8741_of_match);
	498
f0fba2ad LG	499	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	500	static int wm8741_i2c_probe(struct i2c_client *i2c,
	501	const struct i2c_device_id *id)
992bee40	502	{
f0fba2ad	503	struct wm8741_priv *wm8741;
398575db	504	int ret;
992bee40	505
5aefb306 MB	506	wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
5aefb306 MB	507	GFP_KERNEL);
f0fba2ad LG	508	if (wm8741 == NULL)
f0fba2ad LG	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,
398575db MB	515	&soc_codec_dev_wm8741, &wm8741_dai, 1);
992bee40	516
992bee40 IL	517	return ret;
	518	}
	519
f0fba2ad	520	static int wm8741_i2c_remove(struct i2c_client *client)
992bee40	521	{
f0fba2ad	522	snd_soc_unregister_codec(&client->dev);
992bee40 IL	523	return 0;
	524	}
	525
	526	static const struct i2c_device_id wm8741_i2c_id[] = {
	527	{ "wm8741", 0 },
	528	{ }
	529	};
	530	MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
	531
992bee40 IL	532	static struct i2c_driver wm8741_i2c_driver = {
992bee40 IL	533	.driver = {
0473e61b	534	.name = "wm8741",
992bee40	535	.owner = THIS_MODULE,
80080ec5	536	.of_match_table = wm8741_of_match,
992bee40 IL	537	},
992bee40 IL	538	.probe = wm8741_i2c_probe,
f0fba2ad	539	.remove = wm8741_i2c_remove,
992bee40 IL	540	.id_table = wm8741_i2c_id,
	541	};
	542	#endif
	543
39e9b8d2 MB	544	#if defined(CONFIG_SPI_MASTER)
	545	static int __devinit wm8741_spi_probe(struct spi_device *spi)
	546	{
	547	struct wm8741_priv *wm8741;
	548	int ret;
	549
5aefb306 MB	550	wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
5aefb306 MB	551	GFP_KERNEL);
39e9b8d2 MB	552	if (wm8741 == NULL)
	553	return -ENOMEM;
	554
	555	wm8741->control_type = SND_SOC_SPI;
	556	spi_set_drvdata(spi, wm8741);
	557
	558	ret = snd_soc_register_codec(&spi->dev,
	559	&soc_codec_dev_wm8741, &wm8741_dai, 1);
39e9b8d2 MB	560	return ret;
	561	}
	562
	563	static int __devexit wm8741_spi_remove(struct spi_device *spi)
	564	{
	565	snd_soc_unregister_codec(&spi->dev);
39e9b8d2 MB	566	return 0;
	567	}
	568
	569	static struct spi_driver wm8741_spi_driver = {
	570	.driver = {
	571	.name = "wm8741",
	572	.owner = THIS_MODULE,
80080ec5	573	.of_match_table = wm8741_of_match,
39e9b8d2 MB	574	},
	575	.probe = wm8741_spi_probe,
	576	.remove = __devexit_p(wm8741_spi_remove),
	577	};
	578	#endif /* CONFIG_SPI_MASTER */
	579
992bee40 IL	580	static int __init wm8741_modinit(void)
992bee40 IL	581	{
f0fba2ad LG	582	int ret = 0;
f0fba2ad LG	583
992bee40 IL	584	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
992bee40 IL	585	ret = i2c_add_driver(&wm8741_i2c_driver);
3fe4a5ee	586	if (ret != 0)
f0fba2ad	587	pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
992bee40	588	#endif
39e9b8d2 MB	589	#if defined(CONFIG_SPI_MASTER)
	590	ret = spi_register_driver(&wm8741_spi_driver);
	591	if (ret != 0) {
	592	printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
	593	ret);
	594	}
	595	#endif
f0fba2ad LG	596
f0fba2ad LG	597	return ret;
992bee40 IL	598	}
	599	module_init(wm8741_modinit);
	600
	601	static void __exit wm8741_exit(void)
	602	{
39e9b8d2 MB	603	#if defined(CONFIG_SPI_MASTER)
	604	spi_unregister_driver(&wm8741_spi_driver);
	605	#endif
992bee40 IL	606	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	607	i2c_del_driver(&wm8741_i2c_driver);
	608	#endif
	609	}
	610	module_exit(wm8741_exit);
	611
	612	MODULE_DESCRIPTION("ASoC WM8741 driver");
	613	MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
	614	MODULE_LICENSE("GPL");