[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/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.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 |= 0x0003;
		break;
	case SND_SOC_DAIFMT_DSP_B:
		iface |= 0x0013;
		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)
{
	u16 *cache = codec->reg_cache;
	int i;

	/* RESTORE REG Cache */
	for (i = 0; i < WM8741_REGISTER_COUNT; i++) {
		if (cache[i] == wm8741_reg_defaults[i] || WM8741_RESET == i)
			continue;
		snd_soc_write(codec, i, cache[i]);
	}
	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;

	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);
		return ret;
	}

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

	/* 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_DACRLSB_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;
}

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

#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, i;

	wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL);
	if (wm8741 == NULL)
		return -ENOMEM;

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

	ret = regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
				 wm8741->supplies);
	if (ret != 0) {
		dev_err(&i2c->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(&i2c->dev, "Failed to enable supplies: %d\n", ret);
		goto err_get;
	}

	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_enable;
	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:
	kfree(wm8741);
	return ret;
}

static int wm8741_i2c_remove(struct i2c_client *client)
{
	struct wm8741_priv *wm8741 = i2c_get_clientdata(client);

	snd_soc_unregister_codec(&client->dev);
	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	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-codec",
		.owner = THIS_MODULE,
	},
	.probe =    wm8741_i2c_probe,
	.remove =   wm8741_i2c_remove,
	.id_table = wm8741_i2c_id,
};
#endif

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

	return ret;
}
module_init(wm8741_modinit);

static void __exit wm8741_exit(void)
{
#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>
	20	#include <linux/platform_device.h>
	21	#include <linux/regulator/consumer.h>
	22	#include <linux/slab.h>
	23	#include <sound/core.h>
	24	#include <sound/pcm.h>
	25	#include <sound/pcm_params.h>
	26	#include <sound/soc.h>
992bee40 IL	27	#include <sound/initval.h>
	28	#include <sound/tlv.h>
	29
	30	#include "wm8741.h"
	31
992bee40 IL	32	#define WM8741_NUM_SUPPLIES 2
	33	static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
	34	"AVDD",
	35	"DVDD",
	36	};
	37
3fe4a5ee	38	#define WM8741_NUM_RATES 6
992bee40 IL	39
	40	/* codec private data */
	41	struct wm8741_priv {
f0fba2ad	42	enum snd_soc_control_type control_type;
992bee40 IL	43	struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
992bee40 IL	44	unsigned int sysclk;
3fe4a5ee	45	struct snd_pcm_hw_constraint_list *sysclk_constraints;
992bee40 IL	46	};
	47
	48	static const u16 wm8741_reg_defaults[WM8741_REGISTER_COUNT] = {
	49	0x0000, /* R0 - DACLLSB Attenuation */
	50	0x0000, /* R1 - DACLMSB Attenuation */
	51	0x0000, /* R2 - DACRLSB Attenuation */
	52	0x0000, /* R3 - DACRMSB Attenuation */
	53	0x0000, /* R4 - Volume Control */
	54	0x000A, /* R5 - Format Control */
	55	0x0000, /* R6 - Filter Control */
	56	0x0000, /* R7 - Mode Control 1 */
	57	0x0002, /* R8 - Mode Control 2 */
	58	0x0000, /* R9 - Reset */
	59	0x0002, /* R32 - ADDITONAL_CONTROL_1 */
	60	};
	61
	62
	63	static int wm8741_reset(struct snd_soc_codec *codec)
	64	{
	65	return snd_soc_write(codec, WM8741_RESET, 0);
	66	}
	67
	68	static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
	69	static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
	70
	71	static const struct snd_kcontrol_new wm8741_snd_controls[] = {
	72	SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
	73	WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
	74	SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
	75	WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
	76	};
	77
	78	static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
	79	SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
	80	SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
	81	SND_SOC_DAPM_OUTPUT("VOUTLP"),
	82	SND_SOC_DAPM_OUTPUT("VOUTLN"),
	83	SND_SOC_DAPM_OUTPUT("VOUTRP"),
	84	SND_SOC_DAPM_OUTPUT("VOUTRN"),
	85	};
	86
	87	static const struct snd_soc_dapm_route intercon[] = {
	88	{ "VOUTLP", NULL, "DACL" },
	89	{ "VOUTLN", NULL, "DACL" },
	90	{ "VOUTRP", NULL, "DACR" },
	91	{ "VOUTRN", NULL, "DACR" },
	92	};
	93
	94	static int wm8741_add_widgets(struct snd_soc_codec *codec)
	95	{
ce6120cc	96	struct snd_soc_dapm_context *dapm = &codec->dapm;
992bee40	97
ce6120cc LG	98	snd_soc_dapm_new_controls(dapm, wm8741_dapm_widgets,
	99	ARRAY_SIZE(wm8741_dapm_widgets));
	100	snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
992bee40 IL	101
	102	return 0;
	103	}
	104
	105	static struct {
	106	int value;
	107	int ratio;
	108	} lrclk_ratios[WM8741_NUM_RATES] = {
3fe4a5ee IL	109	{ 1, 128 },
	110	{ 2, 192 },
	111	{ 3, 256 },
	112	{ 4, 384 },
	113	{ 5, 512 },
	114	{ 6, 768 },
	115	};
	116
	117	static unsigned int rates_11289[] = {
	118	44100, 88235,
	119	};
	120
	121	static struct snd_pcm_hw_constraint_list constraints_11289 = {
	122	.count = ARRAY_SIZE(rates_11289),
	123	.list = rates_11289,
	124	};
	125
	126	static unsigned int rates_12288[] = {
	127	32000, 48000, 96000,
	128	};
	129
	130	static struct snd_pcm_hw_constraint_list constraints_12288 = {
	131	.count = ARRAY_SIZE(rates_12288),
	132	.list = rates_12288,
	133	};
	134
	135	static unsigned int rates_16384[] = {
	136	32000,
	137	};
	138
	139	static struct snd_pcm_hw_constraint_list constraints_16384 = {
	140	.count = ARRAY_SIZE(rates_16384),
	141	.list = rates_16384,
	142	};
	143
	144	static unsigned int rates_16934[] = {
	145	44100, 88235,
	146	};
	147
	148	static struct snd_pcm_hw_constraint_list constraints_16934 = {
	149	.count = ARRAY_SIZE(rates_16934),
	150	.list = rates_16934,
	151	};
	152
	153	static unsigned int rates_18432[] = {
	154	48000, 96000,
	155	};
	156
	157	static struct snd_pcm_hw_constraint_list constraints_18432 = {
	158	.count = ARRAY_SIZE(rates_18432),
	159	.list = rates_18432,
	160	};
	161
	162	static unsigned int rates_22579[] = {
	163	44100, 88235, 1764000
	164	};
	165
	166	static struct snd_pcm_hw_constraint_list constraints_22579 = {
	167	.count = ARRAY_SIZE(rates_22579),
	168	.list = rates_22579,
	169	};
	170
	171	static unsigned int rates_24576[] = {
	172	32000, 48000, 96000, 192000
173	};
174
175	static struct snd_pcm_hw_constraint_list constraints_24576 = {
176	.count = ARRAY_SIZE(rates_24576),
177	.list = rates_24576,
178	};
179
180	static unsigned int rates_36864[] = {
181	48000, 96000, 19200
182	};
183
184	static struct snd_pcm_hw_constraint_list constraints_36864 = {
185	.count = ARRAY_SIZE(rates_36864),
186	.list = rates_36864,
992bee40 IL	187	};
	188
	189
	190	static int wm8741_startup(struct snd_pcm_substream *substream,
	191	struct snd_soc_dai *dai)
	192	{
	193	struct snd_soc_codec *codec = dai->codec;
	194	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	195
	196	/* The set of sample rates that can be supported depends on the
	197	* MCLK supplied to the CODEC - enforce this.
	198	*/
	199	if (!wm8741->sysclk) {
	200	dev_err(codec->dev,
	201	"No MCLK configured, call set_sysclk() on init\n");
	202	return -EINVAL;
	203	}
	204
	205	snd_pcm_hw_constraint_list(substream->runtime, 0,
	206	SNDRV_PCM_HW_PARAM_RATE,
3fe4a5ee	207	wm8741->sysclk_constraints);
992bee40 IL	208
	209	return 0;
	210	}
	211
	212	static int wm8741_hw_params(struct snd_pcm_substream *substream,
	213	struct snd_pcm_hw_params *params,
	214	struct snd_soc_dai *dai)
	215	{
	216	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	217	struct snd_soc_codec *codec = rtd->codec;
992bee40 IL	218	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	219	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
	220	int i;
	221
	222	/* Find a supported LRCLK ratio */
	223	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
	224	if (wm8741->sysclk / params_rate(params) ==
	225	lrclk_ratios[i].ratio)
	226	break;
	227	}
	228
	229	/* Should never happen, should be handled by constraints */
	230	if (i == ARRAY_SIZE(lrclk_ratios)) {
	231	dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
	232	wm8741->sysclk / params_rate(params));
	233	return -EINVAL;
	234	}
	235
	236	/* bit size */
	237	switch (params_format(params)) {
	238	case SNDRV_PCM_FORMAT_S16_LE:
	239	break;
	240	case SNDRV_PCM_FORMAT_S20_3LE:
	241	iface \|= 0x0001;
	242	break;
	243	case SNDRV_PCM_FORMAT_S24_LE:
	244	iface \|= 0x0002;
	245	break;
	246	case SNDRV_PCM_FORMAT_S32_LE:
	247	iface \|= 0x0003;
	248	break;
	249	default:
	250	dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
	251	params_format(params));
	252	return -EINVAL;
	253	}
	254
	255	dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
	256	params_format(params));
	257
	258	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	259	return 0;
	260	}
	261
	262	static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	263	int clk_id, unsigned int freq, int dir)
	264	{
	265	struct snd_soc_codec *codec = codec_dai->codec;
	266	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40 IL	267
	268	dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
	269
3fe4a5ee IL	270	switch (freq) {
	271	case 11289600:
	272	wm8741->sysclk_constraints = &constraints_11289;
	273	wm8741->sysclk = freq;
	274	return 0;
	275
	276	case 12288000:
	277	wm8741->sysclk_constraints = &constraints_12288;
	278	wm8741->sysclk = freq;
	279	return 0;
	280
	281	case 16384000:
	282	wm8741->sysclk_constraints = &constraints_16384;
	283	wm8741->sysclk = freq;
	284	return 0;
	285
	286	case 16934400:
	287	wm8741->sysclk_constraints = &constraints_16934;
	288	wm8741->sysclk = freq;
	289	return 0;
	290
	291	case 18432000:
	292	wm8741->sysclk_constraints = &constraints_18432;
	293	wm8741->sysclk = freq;
	294	return 0;
	295
	296	case 22579200:
	297	case 33868800:
	298	wm8741->sysclk_constraints = &constraints_22579;
	299	wm8741->sysclk = freq;
	300	return 0;
	301
	302	case 24576000:
	303	wm8741->sysclk_constraints = &constraints_24576;
	304	wm8741->sysclk = freq;
	305	return 0;
	306
	307	case 36864000:
	308	wm8741->sysclk_constraints = &constraints_36864;
	309	wm8741->sysclk = freq;
	310	return 0;
992bee40	311	}
3fe4a5ee	312	return -EINVAL;
992bee40 IL	313	}
	314
	315	static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
	316	unsigned int fmt)
	317	{
	318	struct snd_soc_codec *codec = codec_dai->codec;
	319	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
	320
	321	/* check master/slave audio interface */
	322	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	323	case SND_SOC_DAIFMT_CBS_CFS:
	324	break;
	325	default:
	326	return -EINVAL;
	327	}
	328
	329	/* interface format */
	330	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	331	case SND_SOC_DAIFMT_I2S:
	332	iface \|= 0x0008;
	333	break;
	334	case SND_SOC_DAIFMT_RIGHT_J:
	335	break;
	336	case SND_SOC_DAIFMT_LEFT_J:
	337	iface \|= 0x0004;
	338	break;
	339	case SND_SOC_DAIFMT_DSP_A:
	340	iface \|= 0x0003;
	341	break;
	342	case SND_SOC_DAIFMT_DSP_B:
	343	iface \|= 0x0013;
	344	break;
	345	default:
	346	return -EINVAL;
	347	}
	348
	349	/* clock inversion */
	350	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	351	case SND_SOC_DAIFMT_NB_NF:
	352	break;
	353	case SND_SOC_DAIFMT_IB_IF:
	354	iface \|= 0x0010;
	355	break;
	356	case SND_SOC_DAIFMT_IB_NF:
	357	iface \|= 0x0020;
	358	break;
	359	case SND_SOC_DAIFMT_NB_IF:
	360	iface \|= 0x0030;
	361	break;
	362	default:
	363	return -EINVAL;
	364	}
	365
	366
	367	dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
	368	fmt & SND_SOC_DAIFMT_FORMAT_MASK,
	369	((fmt & SND_SOC_DAIFMT_INV_MASK)));
	370
	371	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	372	return 0;
	373	}
	374
	375	#define WM8741_RATES (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	376	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| \
377	SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_176400 \| \
378	SNDRV_PCM_RATE_192000)
379
380	#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
381	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
382
383	static struct snd_soc_dai_ops wm8741_dai_ops = {
384	.startup = wm8741_startup,
385	.hw_params = wm8741_hw_params,
386	.set_sysclk = wm8741_set_dai_sysclk,
387	.set_fmt = wm8741_set_dai_fmt,
388	};
389
f0fba2ad	390	static struct snd_soc_dai_driver wm8741_dai = {
30e2d368	391	.name = "wm8741",
992bee40 IL	392	.playback = {
	393	.stream_name = "Playback",
	394	.channels_min = 2, /* Mono modes not yet supported */
	395	.channels_max = 2,
	396	.rates = WM8741_RATES,
	397	.formats = WM8741_FORMATS,
	398	},
	399	.ops = &wm8741_dai_ops,
	400	};
992bee40 IL	401
992bee40 IL	402	#ifdef CONFIG_PM
f0fba2ad	403	static int wm8741_resume(struct snd_soc_codec *codec)
992bee40	404	{
992bee40 IL	405	u16 *cache = codec->reg_cache;
	406	int i;
	407
	408	/* RESTORE REG Cache */
	409	for (i = 0; i < WM8741_REGISTER_COUNT; i++) {
	410	if (cache[i] == wm8741_reg_defaults[i] \|\| WM8741_RESET == i)
	411	continue;
	412	snd_soc_write(codec, i, cache[i]);
	413	}
	414	return 0;
	415	}
	416	#else
	417	#define wm8741_suspend NULL
	418	#define wm8741_resume NULL
	419	#endif
	420
f0fba2ad	421	static int wm8741_probe(struct snd_soc_codec *codec)
992bee40	422	{
f0fba2ad	423	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40 IL	424	int ret = 0;
992bee40 IL	425
f0fba2ad LG	426	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8741->control_type);
	427	if (ret != 0) {
	428	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
	429	return ret;
992bee40 IL	430	}
992bee40 IL	431
f0fba2ad	432	ret = wm8741_reset(codec);
992bee40	433	if (ret < 0) {
f0fba2ad LG	434	dev_err(codec->dev, "Failed to issue reset\n");
f0fba2ad LG	435	return ret;
992bee40 IL	436	}
992bee40 IL	437
f0fba2ad	438	/* Change some default settings - latch VU */
a1b3b5ee MB	439	snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
	440	WM8741_UPDATELL, WM8741_UPDATELL);
	441	snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
	442	WM8741_UPDATELM, WM8741_UPDATELM);
	443	snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
	444	WM8741_UPDATERL, WM8741_UPDATERL);
	445	snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
	446	WM8741_UPDATERM, WM8741_UPDATERM);
f0fba2ad	447
992bee40 IL	448	snd_soc_add_controls(codec, wm8741_snd_controls,
	449	ARRAY_SIZE(wm8741_snd_controls));
	450	wm8741_add_widgets(codec);
	451
f0fba2ad	452	dev_dbg(codec->dev, "Successful registration\n");
992bee40	453	return ret;
992bee40 IL	454	}
992bee40 IL	455
f0fba2ad	456	static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
992bee40	457	.probe = wm8741_probe,
992bee40	458	.resume = wm8741_resume,
e5eec34c	459	.reg_cache_size = ARRAY_SIZE(wm8741_reg_defaults),
f0fba2ad	460	.reg_word_size = sizeof(u16),
0aa34b16	461	.reg_cache_default = wm8741_reg_defaults,
992bee40	462	};
992bee40	463
f0fba2ad LG	464	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	465	static int wm8741_i2c_probe(struct i2c_client *i2c,
	466	const struct i2c_device_id *id)
992bee40	467	{
f0fba2ad LG	468	struct wm8741_priv *wm8741;
f0fba2ad LG	469	int ret, i;
992bee40	470
f0fba2ad LG	471	wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL);
	472	if (wm8741 == NULL)
	473	return -ENOMEM;
992bee40	474
992bee40 IL	475	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
	476	wm8741->supplies[i].supply = wm8741_supply_names[i];
	477
f0fba2ad	478	ret = regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
992bee40 IL	479	wm8741->supplies);
992bee40 IL	480	if (ret != 0) {
f0fba2ad	481	dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
992bee40 IL	482	goto err;
	483	}
	484
	485	ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
	486	wm8741->supplies);
	487	if (ret != 0) {
f0fba2ad	488	dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
992bee40 IL	489	goto err_get;
	490	}
	491
f0fba2ad	492	i2c_set_clientdata(i2c, wm8741);
f0fba2ad	493	wm8741->control_type = SND_SOC_I2C;
992bee40	494
f0fba2ad LG	495	ret = snd_soc_register_codec(&i2c->dev,
	496	&soc_codec_dev_wm8741, &wm8741_dai, 1);
	497	if (ret < 0)
	498	goto err_enable;
	499	return ret;
992bee40 IL	500
	501	err_enable:
	502	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	503
	504	err_get:
	505	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
992bee40 IL	506	err:
	507	kfree(wm8741);
	508	return ret;
	509	}
	510
f0fba2ad	511	static int wm8741_i2c_remove(struct i2c_client *client)
992bee40 IL	512	{
992bee40 IL	513	struct wm8741_priv *wm8741 = i2c_get_clientdata(client);
f0fba2ad LG	514
	515	snd_soc_unregister_codec(&client->dev);
	516	regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	517	kfree(i2c_get_clientdata(client));
992bee40 IL	518	return 0;
	519	}
	520
	521	static const struct i2c_device_id wm8741_i2c_id[] = {
	522	{ "wm8741", 0 },
	523	{ }
	524	};
	525	MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
	526
992bee40 IL	527	static struct i2c_driver wm8741_i2c_driver = {
992bee40 IL	528	.driver = {
f0fba2ad	529	.name = "wm8741-codec",
992bee40 IL	530	.owner = THIS_MODULE,
	531	},
	532	.probe = wm8741_i2c_probe,
f0fba2ad	533	.remove = wm8741_i2c_remove,
992bee40 IL	534	.id_table = wm8741_i2c_id,
	535	};
	536	#endif
	537
	538	static int __init wm8741_modinit(void)
	539	{
f0fba2ad LG	540	int ret = 0;
f0fba2ad LG	541
992bee40 IL	542	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
992bee40 IL	543	ret = i2c_add_driver(&wm8741_i2c_driver);
3fe4a5ee	544	if (ret != 0)
f0fba2ad	545	pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
992bee40	546	#endif
f0fba2ad LG	547
f0fba2ad LG	548	return ret;
992bee40 IL	549	}
	550	module_init(wm8741_modinit);
	551
	552	static void __exit wm8741_exit(void)
	553	{
	554	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	555	i2c_del_driver(&wm8741_i2c_driver);
	556	#endif
	557	}
	558	module_exit(wm8741_exit);
	559
	560	MODULE_DESCRIPTION("ASoC WM8741 driver");
	561	MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
	562	MODULE_LICENSE("GPL");