sound/soc/codecs/wm9705.c - kernel/msm-4.19 - Gitiles

 /*
  * wm9705.c  --  ALSA Soc WM9705 codec support
  *
  * Copyright 2008 Ian Molton <spyro@f2s.com>
  *
  *  This program is free software; you can redistribute  it and/or modify it
  *  under  the terms of  the GNU General  Public License as published by the
  *  Free Software Foundation; Version 2 of the  License only.
  *
  */

 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/ac97_codec.h>
 #include <sound/initval.h>
 #include <sound/soc.h>

 #include "wm9705.h"

 /*
  * WM9705 register cache
  */
 static const u16 wm9705_reg[] = {
 	0x6150, 0x8000, 0x8000, 0x8000, /* 0x0  */
 	0x0000, 0x8000, 0x8008, 0x8008, /* 0x8  */
 	0x8808, 0x8808, 0x8808, 0x8808, /* 0x10 */
 	0x8808, 0x0000, 0x8000, 0x0000, /* 0x18 */
 	0x0000, 0x0000, 0x0000, 0x000f, /* 0x20 */
 	0x0605, 0x0000, 0xbb80, 0x0000, /* 0x28 */
 	0x0000, 0xbb80, 0x0000, 0x0000, /* 0x30 */
 	0x0000, 0x2000, 0x0000, 0x0000, /* 0x38 */
 	0x0000, 0x0000, 0x0000, 0x0000, /* 0x40 */
 	0x0000, 0x0000, 0x0000, 0x0000, /* 0x48 */
 	0x0000, 0x0000, 0x0000, 0x0000, /* 0x50 */
 	0x0000, 0x0000, 0x0000, 0x0000, /* 0x58 */
 	0x0000, 0x0000, 0x0000, 0x0000, /* 0x60 */
 	0x0000, 0x0000, 0x0000, 0x0000, /* 0x68 */
 	0x0000, 0x0808, 0x0000, 0x0006, /* 0x70 */
 	0x0000, 0x0000, 0x574d, 0x4c05, /* 0x78 */
 };

 static const struct snd_kcontrol_new wm9705_snd_ac97_controls[] = {
 	SOC_DOUBLE("Master Playback Volume", AC97_MASTER, 8, 0, 31, 1),
 	SOC_SINGLE("Master Playback Switch", AC97_MASTER, 15, 1, 1),
 	SOC_DOUBLE("Headphone Playback Volume", AC97_HEADPHONE, 8, 0, 31, 1),
 	SOC_SINGLE("Headphone Playback Switch", AC97_HEADPHONE, 15, 1, 1),
 	SOC_DOUBLE("PCM Playback Volume", AC97_PCM, 8, 0, 31, 1),
 	SOC_SINGLE("PCM Playback Switch", AC97_PCM, 15, 1, 1),
 	SOC_SINGLE("Mono Playback Volume", AC97_MASTER_MONO, 0, 31, 1),
 	SOC_SINGLE("Mono Playback Switch", AC97_MASTER_MONO, 15, 1, 1),
 	SOC_SINGLE("PCBeep Playback Volume", AC97_PC_BEEP, 1, 15, 1),
 	SOC_SINGLE("Phone Playback Volume", AC97_PHONE, 0, 31, 1),
 	SOC_DOUBLE("Line Playback Volume", AC97_LINE, 8, 0, 31, 1),
 	SOC_DOUBLE("CD Playback Volume", AC97_CD, 8, 0, 31, 1),
 	SOC_SINGLE("Mic Playback Volume", AC97_MIC, 0, 31, 1),
 	SOC_SINGLE("Mic 20dB Boost Switch", AC97_MIC, 6, 1, 0),
 	SOC_DOUBLE("Capture Volume", AC97_REC_GAIN, 8, 0, 15, 0),
 	SOC_SINGLE("Capture Switch", AC97_REC_GAIN, 15, 1, 1),
 };

 static const char *wm9705_mic[] = {"Mic 1", "Mic 2"};
 static const char *wm9705_rec_sel[] = {"Mic", "CD", "NC", "NC",
 	"Line", "Stereo Mix", "Mono Mix", "Phone"};

 static const struct soc_enum wm9705_enum_mic =
 	SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 8, 2, wm9705_mic);
 static const struct soc_enum wm9705_enum_rec_l =
 	SOC_ENUM_SINGLE(AC97_REC_SEL, 8, 8, wm9705_rec_sel);
 static const struct soc_enum wm9705_enum_rec_r =
 	SOC_ENUM_SINGLE(AC97_REC_SEL, 0, 8, wm9705_rec_sel);

 /* Headphone Mixer */
 static const struct snd_kcontrol_new wm9705_hp_mixer_controls[] = {
 	SOC_DAPM_SINGLE("PCBeep Playback Switch", AC97_PC_BEEP, 15, 1, 1),
 	SOC_DAPM_SINGLE("CD Playback Switch", AC97_CD, 15, 1, 1),
 	SOC_DAPM_SINGLE("Mic Playback Switch", AC97_MIC, 15, 1, 1),
 	SOC_DAPM_SINGLE("Phone Playback Switch", AC97_PHONE, 15, 1, 1),
 	SOC_DAPM_SINGLE("Line Playback Switch", AC97_LINE, 15, 1, 1),
 };

 /* Mic source */
 static const struct snd_kcontrol_new wm9705_mic_src_controls =
 	SOC_DAPM_ENUM("Route", wm9705_enum_mic);

 /* Capture source */
 static const struct snd_kcontrol_new wm9705_capture_selectl_controls =
 	SOC_DAPM_ENUM("Route", wm9705_enum_rec_l);
 static const struct snd_kcontrol_new wm9705_capture_selectr_controls =
 	SOC_DAPM_ENUM("Route", wm9705_enum_rec_r);

 /* DAPM widgets */
 static const struct snd_soc_dapm_widget wm9705_dapm_widgets[] = {
 	SND_SOC_DAPM_MUX("Mic Source", SND_SOC_NOPM, 0, 0,
 		&wm9705_mic_src_controls),
 	SND_SOC_DAPM_MUX("Left Capture Source", SND_SOC_NOPM, 0, 0,
 		&wm9705_capture_selectl_controls),
 	SND_SOC_DAPM_MUX("Right Capture Source", SND_SOC_NOPM, 0, 0,
 		&wm9705_capture_selectr_controls),
 	SND_SOC_DAPM_DAC("Left DAC", "Left HiFi Playback",
 		SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_DAC("Right DAC", "Right HiFi Playback",
 		SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_MIXER_NAMED_CTL("HP Mixer", SND_SOC_NOPM, 0, 0,
 		&wm9705_hp_mixer_controls[0],
 		ARRAY_SIZE(wm9705_hp_mixer_controls)),
 	SND_SOC_DAPM_MIXER("Mono Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_ADC("Left ADC", "Left HiFi Capture", SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_ADC("Right ADC", "Right HiFi Capture", SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_PGA("Headphone PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_PGA("Speaker PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_PGA("Line PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_PGA("Line out PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_PGA("Mono PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_PGA("Phone PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_PGA("Mic PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_PGA("PCBEEP PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_PGA("CD PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_PGA("ADC PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 	SND_SOC_DAPM_OUTPUT("HPOUTL"),
 	SND_SOC_DAPM_OUTPUT("HPOUTR"),
 	SND_SOC_DAPM_OUTPUT("LOUT"),
 	SND_SOC_DAPM_OUTPUT("ROUT"),
 	SND_SOC_DAPM_OUTPUT("MONOOUT"),
 	SND_SOC_DAPM_INPUT("PHONE"),
 	SND_SOC_DAPM_INPUT("LINEINL"),
 	SND_SOC_DAPM_INPUT("LINEINR"),
 	SND_SOC_DAPM_INPUT("CDINL"),
 	SND_SOC_DAPM_INPUT("CDINR"),
 	SND_SOC_DAPM_INPUT("PCBEEP"),
 	SND_SOC_DAPM_INPUT("MIC1"),
 	SND_SOC_DAPM_INPUT("MIC2"),
 };

 /* Audio map
  * WM9705 has no switches to disable the route from the inputs to the HP mixer
  * so in order to prevent active inputs from forcing the audio outputs to be
  * constantly enabled, we use the mutes on those inputs to simulate such
  * controls.
  */
 static const struct snd_soc_dapm_route wm9705_audio_map[] = {
 	/* HP mixer */
 	{"HP Mixer", "PCBeep Playback Switch", "PCBEEP PGA"},
 	{"HP Mixer", "CD Playback Switch", "CD PGA"},
 	{"HP Mixer", "Mic Playback Switch", "Mic PGA"},
 	{"HP Mixer", "Phone Playback Switch", "Phone PGA"},
 	{"HP Mixer", "Line Playback Switch", "Line PGA"},
 	{"HP Mixer", NULL, "Left DAC"},
 	{"HP Mixer", NULL, "Right DAC"},

 	/* mono mixer */
 	{"Mono Mixer", NULL, "HP Mixer"},

 	/* outputs */
 	{"Headphone PGA", NULL, "HP Mixer"},
 	{"HPOUTL", NULL, "Headphone PGA"},
 	{"HPOUTR", NULL, "Headphone PGA"},
 	{"Line out PGA", NULL, "HP Mixer"},
 	{"LOUT", NULL, "Line out PGA"},
 	{"ROUT", NULL, "Line out PGA"},
 	{"Mono PGA", NULL, "Mono Mixer"},
 	{"MONOOUT", NULL, "Mono PGA"},

 	/* inputs */
 	{"CD PGA", NULL, "CDINL"},
 	{"CD PGA", NULL, "CDINR"},
 	{"Line PGA", NULL, "LINEINL"},
 	{"Line PGA", NULL, "LINEINR"},
 	{"Phone PGA", NULL, "PHONE"},
 	{"Mic Source", "Mic 1", "MIC1"},
 	{"Mic Source", "Mic 2", "MIC2"},
 	{"Mic PGA", NULL, "Mic Source"},
 	{"PCBEEP PGA", NULL, "PCBEEP"},

 	/* Left capture selector */
 	{"Left Capture Source", "Mic", "Mic Source"},
 	{"Left Capture Source", "CD", "CDINL"},
 	{"Left Capture Source", "Line", "LINEINL"},
 	{"Left Capture Source", "Stereo Mix", "HP Mixer"},
 	{"Left Capture Source", "Mono Mix", "HP Mixer"},
 	{"Left Capture Source", "Phone", "PHONE"},

 	/* Right capture source */
 	{"Right Capture Source", "Mic", "Mic Source"},
 	{"Right Capture Source", "CD", "CDINR"},
 	{"Right Capture Source", "Line", "LINEINR"},
 	{"Right Capture Source", "Stereo Mix", "HP Mixer"},
 	{"Right Capture Source", "Mono Mix", "HP Mixer"},
 	{"Right Capture Source", "Phone", "PHONE"},

 	{"ADC PGA", NULL, "Left Capture Source"},
 	{"ADC PGA", NULL, "Right Capture Source"},

 	/* ADC's */
 	{"Left ADC",  NULL, "ADC PGA"},
 	{"Right ADC", NULL, "ADC PGA"},
 };

 /* We use a register cache to enhance read performance. */
 static unsigned int ac97_read(struct snd_soc_codec *codec, unsigned int reg)
 {
 	u16 *cache = codec->reg_cache;

 	switch (reg) {
 	case AC97_RESET:
 	case AC97_VENDOR_ID1:
 	case AC97_VENDOR_ID2:
 		return soc_ac97_ops.read(codec->ac97, reg);
 	default:
 		reg = reg >> 1;

 		if (reg >= (ARRAY_SIZE(wm9705_reg)))
 			return -EIO;

 		return cache[reg];
 	}
 }

 static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 	unsigned int val)
 {
 	u16 *cache = codec->reg_cache;

 	soc_ac97_ops.write(codec->ac97, reg, val);
 	reg = reg >> 1;
 	if (reg < (ARRAY_SIZE(wm9705_reg)))
 		cache[reg] = val;

 	return 0;
 }

 static int ac97_prepare(struct snd_pcm_substream *substream,
 			struct snd_soc_dai *dai)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_codec *codec = rtd->codec;
 	int reg;
 	u16 vra;

 	vra = ac97_read(codec, AC97_EXTENDED_STATUS);
 	ac97_write(codec, AC97_EXTENDED_STATUS, vra | 0x1);

 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		reg = AC97_PCM_FRONT_DAC_RATE;
 	else
 		reg = AC97_PCM_LR_ADC_RATE;

 	return ac97_write(codec, reg, runtime->rate);
 }

 #define WM9705_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | \
 			SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
 			SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 			SNDRV_PCM_RATE_48000)

 static const struct snd_soc_dai_ops wm9705_dai_ops = {
 	.prepare	= ac97_prepare,
 };

 static struct snd_soc_dai_driver wm9705_dai[] = {
 	{
 		.name = "wm9705-hifi",
 		.ac97_control = 1,
 		.playback = {
 			.stream_name = "HiFi Playback",
 			.channels_min = 1,
 			.channels_max = 2,
 			.rates = WM9705_AC97_RATES,
 			.formats = SND_SOC_STD_AC97_FMTS,
 		},
 		.capture = {
 			.stream_name = "HiFi Capture",
 			.channels_min = 1,
 			.channels_max = 2,
 			.rates = WM9705_AC97_RATES,
 			.formats = SND_SOC_STD_AC97_FMTS,
 		},
 		.ops = &wm9705_dai_ops,
 	},
 	{
 		.name = "wm9705-aux",
 		.playback = {
 			.stream_name = "Aux Playback",
 			.channels_min = 1,
 			.channels_max = 1,
 			.rates = WM9705_AC97_RATES,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
 		},
 	}
 };

 static int wm9705_reset(struct snd_soc_codec *codec)
 {
 	if (soc_ac97_ops.reset) {
 		soc_ac97_ops.reset(codec->ac97);
 		if (ac97_read(codec, 0) == wm9705_reg[0])
 			return 0; /* Success */
 	}

 	return -EIO;
 }

 #ifdef CONFIG_PM
 static int wm9705_soc_suspend(struct snd_soc_codec *codec)
 {
 	soc_ac97_ops.write(codec->ac97, AC97_POWERDOWN, 0xffff);

 	return 0;
 }

 static int wm9705_soc_resume(struct snd_soc_codec *codec)
 {
 	int i, ret;
 	u16 *cache = codec->reg_cache;

 	ret = wm9705_reset(codec);
 	if (ret < 0) {
 		printk(KERN_ERR "could not reset AC97 codec\n");
 		return ret;
 	}

 	for (i = 2; i < ARRAY_SIZE(wm9705_reg) << 1; i += 2) {
 		soc_ac97_ops.write(codec->ac97, i, cache[i>>1]);
 	}

 	return 0;
 }
 #else
 #define wm9705_soc_suspend NULL
 #define wm9705_soc_resume NULL
 #endif

 static int wm9705_soc_probe(struct snd_soc_codec *codec)
 {
 	int ret = 0;

 	printk(KERN_INFO "WM9705 SoC Audio Codec\n");

 	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
 	if (ret < 0) {
 		printk(KERN_ERR "wm9705: failed to register AC97 codec\n");
 		return ret;
 	}

 	ret = wm9705_reset(codec);
 	if (ret)
 		goto reset_err;

 	snd_soc_add_codec_controls(codec, wm9705_snd_ac97_controls,
 				ARRAY_SIZE(wm9705_snd_ac97_controls));

 	return 0;

 reset_err:
 	snd_soc_free_ac97_codec(codec);
 	return ret;
 }

 static int wm9705_soc_remove(struct snd_soc_codec *codec)
 {
 	snd_soc_free_ac97_codec(codec);
 	return 0;
 }

 static struct snd_soc_codec_driver soc_codec_dev_wm9705 = {
 	.probe = 	wm9705_soc_probe,
 	.remove = 	wm9705_soc_remove,
 	.suspend =	wm9705_soc_suspend,
 	.resume =	wm9705_soc_resume,
 	.read = ac97_read,
 	.write = ac97_write,
 	.reg_cache_size = ARRAY_SIZE(wm9705_reg),
 	.reg_word_size = sizeof(u16),
 	.reg_cache_step = 2,
 	.reg_cache_default = wm9705_reg,
 	.dapm_widgets = wm9705_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(wm9705_dapm_widgets),
 	.dapm_routes = wm9705_audio_map,
 	.num_dapm_routes = ARRAY_SIZE(wm9705_audio_map),
 };

 static __devinit int wm9705_probe(struct platform_device *pdev)
 {
 	return snd_soc_register_codec(&pdev->dev,
 			&soc_codec_dev_wm9705, wm9705_dai, ARRAY_SIZE(wm9705_dai));
 }

 static int __devexit wm9705_remove(struct platform_device *pdev)
 {
 	snd_soc_unregister_codec(&pdev->dev);
 	return 0;
 }

 static struct platform_driver wm9705_codec_driver = {
 	.driver = {
 			.name = "wm9705-codec",
 			.owner = THIS_MODULE,
 	},

 	.probe = wm9705_probe,
 	.remove = __devexit_p(wm9705_remove),
 };

 module_platform_driver(wm9705_codec_driver);

 MODULE_DESCRIPTION("ASoC WM9705 driver");
 MODULE_AUTHOR("Ian Molton");
 MODULE_LICENSE("GPL v2");
	/*
	* wm9705.c -- ALSA Soc WM9705 codec support
	*
	* Copyright 2008 Ian Molton <spyro@f2s.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; Version 2 of the License only.
	*
	*/

	#include <linux/init.h>
	#include <linux/slab.h>
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/device.h>
	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/ac97_codec.h>
	#include <sound/initval.h>
	#include <sound/soc.h>

	#include "wm9705.h"

	/*
	* WM9705 register cache
	*/
	static const u16 wm9705_reg[] = {
	0x6150, 0x8000, 0x8000, 0x8000, /* 0x0 */
	0x0000, 0x8000, 0x8008, 0x8008, /* 0x8 */
	0x8808, 0x8808, 0x8808, 0x8808, /* 0x10 */
	0x8808, 0x0000, 0x8000, 0x0000, /* 0x18 */
	0x0000, 0x0000, 0x0000, 0x000f, /* 0x20 */
	0x0605, 0x0000, 0xbb80, 0x0000, /* 0x28 */
	0x0000, 0xbb80, 0x0000, 0x0000, /* 0x30 */
	0x0000, 0x2000, 0x0000, 0x0000, /* 0x38 */
	0x0000, 0x0000, 0x0000, 0x0000, /* 0x40 */
	0x0000, 0x0000, 0x0000, 0x0000, /* 0x48 */
	0x0000, 0x0000, 0x0000, 0x0000, /* 0x50 */
	0x0000, 0x0000, 0x0000, 0x0000, /* 0x58 */
	0x0000, 0x0000, 0x0000, 0x0000, /* 0x60 */
	0x0000, 0x0000, 0x0000, 0x0000, /* 0x68 */
	0x0000, 0x0808, 0x0000, 0x0006, /* 0x70 */
	0x0000, 0x0000, 0x574d, 0x4c05, /* 0x78 */
	};

	static const struct snd_kcontrol_new wm9705_snd_ac97_controls[] = {
	SOC_DOUBLE("Master Playback Volume", AC97_MASTER, 8, 0, 31, 1),
	SOC_SINGLE("Master Playback Switch", AC97_MASTER, 15, 1, 1),
	SOC_DOUBLE("Headphone Playback Volume", AC97_HEADPHONE, 8, 0, 31, 1),
	SOC_SINGLE("Headphone Playback Switch", AC97_HEADPHONE, 15, 1, 1),
	SOC_DOUBLE("PCM Playback Volume", AC97_PCM, 8, 0, 31, 1),
	SOC_SINGLE("PCM Playback Switch", AC97_PCM, 15, 1, 1),
	SOC_SINGLE("Mono Playback Volume", AC97_MASTER_MONO, 0, 31, 1),
	SOC_SINGLE("Mono Playback Switch", AC97_MASTER_MONO, 15, 1, 1),
	SOC_SINGLE("PCBeep Playback Volume", AC97_PC_BEEP, 1, 15, 1),
	SOC_SINGLE("Phone Playback Volume", AC97_PHONE, 0, 31, 1),
	SOC_DOUBLE("Line Playback Volume", AC97_LINE, 8, 0, 31, 1),
	SOC_DOUBLE("CD Playback Volume", AC97_CD, 8, 0, 31, 1),
	SOC_SINGLE("Mic Playback Volume", AC97_MIC, 0, 31, 1),
	SOC_SINGLE("Mic 20dB Boost Switch", AC97_MIC, 6, 1, 0),
	SOC_DOUBLE("Capture Volume", AC97_REC_GAIN, 8, 0, 15, 0),
	SOC_SINGLE("Capture Switch", AC97_REC_GAIN, 15, 1, 1),
	};

	static const char *wm9705_mic[] = {"Mic 1", "Mic 2"};
	static const char *wm9705_rec_sel[] = {"Mic", "CD", "NC", "NC",
	"Line", "Stereo Mix", "Mono Mix", "Phone"};

	static const struct soc_enum wm9705_enum_mic =
	SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 8, 2, wm9705_mic);
	static const struct soc_enum wm9705_enum_rec_l =
	SOC_ENUM_SINGLE(AC97_REC_SEL, 8, 8, wm9705_rec_sel);
	static const struct soc_enum wm9705_enum_rec_r =
	SOC_ENUM_SINGLE(AC97_REC_SEL, 0, 8, wm9705_rec_sel);

	/* Headphone Mixer */
	static const struct snd_kcontrol_new wm9705_hp_mixer_controls[] = {
	SOC_DAPM_SINGLE("PCBeep Playback Switch", AC97_PC_BEEP, 15, 1, 1),
	SOC_DAPM_SINGLE("CD Playback Switch", AC97_CD, 15, 1, 1),
	SOC_DAPM_SINGLE("Mic Playback Switch", AC97_MIC, 15, 1, 1),
	SOC_DAPM_SINGLE("Phone Playback Switch", AC97_PHONE, 15, 1, 1),
	SOC_DAPM_SINGLE("Line Playback Switch", AC97_LINE, 15, 1, 1),
	};

	/* Mic source */
	static const struct snd_kcontrol_new wm9705_mic_src_controls =
	SOC_DAPM_ENUM("Route", wm9705_enum_mic);

	/* Capture source */
	static const struct snd_kcontrol_new wm9705_capture_selectl_controls =
	SOC_DAPM_ENUM("Route", wm9705_enum_rec_l);
	static const struct snd_kcontrol_new wm9705_capture_selectr_controls =
	SOC_DAPM_ENUM("Route", wm9705_enum_rec_r);

	/* DAPM widgets */
	static const struct snd_soc_dapm_widget wm9705_dapm_widgets[] = {
	SND_SOC_DAPM_MUX("Mic Source", SND_SOC_NOPM, 0, 0,
	&wm9705_mic_src_controls),
	SND_SOC_DAPM_MUX("Left Capture Source", SND_SOC_NOPM, 0, 0,
	&wm9705_capture_selectl_controls),
	SND_SOC_DAPM_MUX("Right Capture Source", SND_SOC_NOPM, 0, 0,
	&wm9705_capture_selectr_controls),
	SND_SOC_DAPM_DAC("Left DAC", "Left HiFi Playback",
	SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_DAC("Right DAC", "Right HiFi Playback",
	SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_MIXER_NAMED_CTL("HP Mixer", SND_SOC_NOPM, 0, 0,
	&wm9705_hp_mixer_controls[0],
	ARRAY_SIZE(wm9705_hp_mixer_controls)),
	SND_SOC_DAPM_MIXER("Mono Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_ADC("Left ADC", "Left HiFi Capture", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_ADC("Right ADC", "Right HiFi Capture", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_PGA("Headphone PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Speaker PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Line PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Line out PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Mono PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Phone PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Mic PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("PCBEEP PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("CD PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("ADC PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_OUTPUT("HPOUTL"),
	SND_SOC_DAPM_OUTPUT("HPOUTR"),
	SND_SOC_DAPM_OUTPUT("LOUT"),
	SND_SOC_DAPM_OUTPUT("ROUT"),
	SND_SOC_DAPM_OUTPUT("MONOOUT"),
	SND_SOC_DAPM_INPUT("PHONE"),
	SND_SOC_DAPM_INPUT("LINEINL"),
	SND_SOC_DAPM_INPUT("LINEINR"),
	SND_SOC_DAPM_INPUT("CDINL"),
	SND_SOC_DAPM_INPUT("CDINR"),
	SND_SOC_DAPM_INPUT("PCBEEP"),
	SND_SOC_DAPM_INPUT("MIC1"),
	SND_SOC_DAPM_INPUT("MIC2"),
	};

	/* Audio map
	* WM9705 has no switches to disable the route from the inputs to the HP mixer
	* so in order to prevent active inputs from forcing the audio outputs to be
	* constantly enabled, we use the mutes on those inputs to simulate such
	* controls.
	*/
	static const struct snd_soc_dapm_route wm9705_audio_map[] = {
	/* HP mixer */
	{"HP Mixer", "PCBeep Playback Switch", "PCBEEP PGA"},
	{"HP Mixer", "CD Playback Switch", "CD PGA"},
	{"HP Mixer", "Mic Playback Switch", "Mic PGA"},
	{"HP Mixer", "Phone Playback Switch", "Phone PGA"},
	{"HP Mixer", "Line Playback Switch", "Line PGA"},
	{"HP Mixer", NULL, "Left DAC"},
	{"HP Mixer", NULL, "Right DAC"},

	/* mono mixer */
	{"Mono Mixer", NULL, "HP Mixer"},

	/* outputs */
	{"Headphone PGA", NULL, "HP Mixer"},
	{"HPOUTL", NULL, "Headphone PGA"},
	{"HPOUTR", NULL, "Headphone PGA"},
	{"Line out PGA", NULL, "HP Mixer"},
	{"LOUT", NULL, "Line out PGA"},
	{"ROUT", NULL, "Line out PGA"},
	{"Mono PGA", NULL, "Mono Mixer"},
	{"MONOOUT", NULL, "Mono PGA"},

	/* inputs */
	{"CD PGA", NULL, "CDINL"},
	{"CD PGA", NULL, "CDINR"},
	{"Line PGA", NULL, "LINEINL"},
	{"Line PGA", NULL, "LINEINR"},
	{"Phone PGA", NULL, "PHONE"},
	{"Mic Source", "Mic 1", "MIC1"},
	{"Mic Source", "Mic 2", "MIC2"},
	{"Mic PGA", NULL, "Mic Source"},
	{"PCBEEP PGA", NULL, "PCBEEP"},

	/* Left capture selector */
	{"Left Capture Source", "Mic", "Mic Source"},
	{"Left Capture Source", "CD", "CDINL"},
	{"Left Capture Source", "Line", "LINEINL"},
	{"Left Capture Source", "Stereo Mix", "HP Mixer"},
	{"Left Capture Source", "Mono Mix", "HP Mixer"},
	{"Left Capture Source", "Phone", "PHONE"},

	/* Right capture source */
	{"Right Capture Source", "Mic", "Mic Source"},
	{"Right Capture Source", "CD", "CDINR"},
	{"Right Capture Source", "Line", "LINEINR"},
	{"Right Capture Source", "Stereo Mix", "HP Mixer"},
	{"Right Capture Source", "Mono Mix", "HP Mixer"},
	{"Right Capture Source", "Phone", "PHONE"},

	{"ADC PGA", NULL, "Left Capture Source"},
	{"ADC PGA", NULL, "Right Capture Source"},

	/* ADC's */
	{"Left ADC", NULL, "ADC PGA"},
	{"Right ADC", NULL, "ADC PGA"},
	};

	/* We use a register cache to enhance read performance. */
	static unsigned int ac97_read(struct snd_soc_codec *codec, unsigned int reg)
	{
	u16 *cache = codec->reg_cache;

	switch (reg) {
	case AC97_RESET:
	case AC97_VENDOR_ID1:
	case AC97_VENDOR_ID2:
	return soc_ac97_ops.read(codec->ac97, reg);
	default:
	reg = reg >> 1;

	if (reg >= (ARRAY_SIZE(wm9705_reg)))
	return -EIO;

	return cache[reg];
	}
	}

	static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
	unsigned int val)
	{
	u16 *cache = codec->reg_cache;

	soc_ac97_ops.write(codec->ac97, reg, val);
	reg = reg >> 1;
	if (reg < (ARRAY_SIZE(wm9705_reg)))
	cache[reg] = val;

	return 0;
	}

	static int ac97_prepare(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->codec;
	int reg;
	u16 vra;

	vra = ac97_read(codec, AC97_EXTENDED_STATUS);
	ac97_write(codec, AC97_EXTENDED_STATUS, vra \| 0x1);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	reg = AC97_PCM_FRONT_DAC_RATE;
	else
	reg = AC97_PCM_LR_ADC_RATE;

	return ac97_write(codec, reg, runtime->rate);
	}

	#define WM9705_AC97_RATES (SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \| \
	SNDRV_PCM_RATE_16000 \| SNDRV_PCM_RATE_22050 \| \
	SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	SNDRV_PCM_RATE_48000)

	static const struct snd_soc_dai_ops wm9705_dai_ops = {
	.prepare = ac97_prepare,
	};

	static struct snd_soc_dai_driver wm9705_dai[] = {
	{
	.name = "wm9705-hifi",
	.ac97_control = 1,
	.playback = {
	.stream_name = "HiFi Playback",
	.channels_min = 1,
	.channels_max = 2,
	.rates = WM9705_AC97_RATES,
	.formats = SND_SOC_STD_AC97_FMTS,
	},
	.capture = {
	.stream_name = "HiFi Capture",
	.channels_min = 1,
	.channels_max = 2,
	.rates = WM9705_AC97_RATES,
	.formats = SND_SOC_STD_AC97_FMTS,
	},
	.ops = &wm9705_dai_ops,
	},
	{
	.name = "wm9705-aux",
	.playback = {
	.stream_name = "Aux Playback",
	.channels_min = 1,
	.channels_max = 1,
	.rates = WM9705_AC97_RATES,
	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	}
	};

	static int wm9705_reset(struct snd_soc_codec *codec)
	{
	if (soc_ac97_ops.reset) {
	soc_ac97_ops.reset(codec->ac97);
	if (ac97_read(codec, 0) == wm9705_reg[0])
	return 0; /* Success */
	}

	return -EIO;
	}

	#ifdef CONFIG_PM
	static int wm9705_soc_suspend(struct snd_soc_codec *codec)
	{
	soc_ac97_ops.write(codec->ac97, AC97_POWERDOWN, 0xffff);

	return 0;
	}

	static int wm9705_soc_resume(struct snd_soc_codec *codec)
	{
	int i, ret;
	u16 *cache = codec->reg_cache;

	ret = wm9705_reset(codec);
	if (ret < 0) {
	printk(KERN_ERR "could not reset AC97 codec\n");
	return ret;
	}

	for (i = 2; i < ARRAY_SIZE(wm9705_reg) << 1; i += 2) {
	soc_ac97_ops.write(codec->ac97, i, cache[i>>1]);
	}

	return 0;
	}
	#else
	#define wm9705_soc_suspend NULL
	#define wm9705_soc_resume NULL
	#endif

	static int wm9705_soc_probe(struct snd_soc_codec *codec)
	{
	int ret = 0;

	printk(KERN_INFO "WM9705 SoC Audio Codec\n");

	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
	if (ret < 0) {
	printk(KERN_ERR "wm9705: failed to register AC97 codec\n");
	return ret;
	}

	ret = wm9705_reset(codec);
	if (ret)
	goto reset_err;

	snd_soc_add_codec_controls(codec, wm9705_snd_ac97_controls,
	ARRAY_SIZE(wm9705_snd_ac97_controls));

	return 0;

	reset_err:
	snd_soc_free_ac97_codec(codec);
	return ret;
	}

	static int wm9705_soc_remove(struct snd_soc_codec *codec)
	{
	snd_soc_free_ac97_codec(codec);
	return 0;
	}

	static struct snd_soc_codec_driver soc_codec_dev_wm9705 = {
	.probe = wm9705_soc_probe,
	.remove = wm9705_soc_remove,
	.suspend = wm9705_soc_suspend,
	.resume = wm9705_soc_resume,
	.read = ac97_read,
	.write = ac97_write,
	.reg_cache_size = ARRAY_SIZE(wm9705_reg),
	.reg_word_size = sizeof(u16),
	.reg_cache_step = 2,
	.reg_cache_default = wm9705_reg,
	.dapm_widgets = wm9705_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(wm9705_dapm_widgets),
	.dapm_routes = wm9705_audio_map,
	.num_dapm_routes = ARRAY_SIZE(wm9705_audio_map),
	};

	static __devinit int wm9705_probe(struct platform_device *pdev)
	{
	return snd_soc_register_codec(&pdev->dev,
	&soc_codec_dev_wm9705, wm9705_dai, ARRAY_SIZE(wm9705_dai));
	}

	static int __devexit wm9705_remove(struct platform_device *pdev)
	{
	snd_soc_unregister_codec(&pdev->dev);
	return 0;
	}

	static struct platform_driver wm9705_codec_driver = {
	.driver = {
	.name = "wm9705-codec",
	.owner = THIS_MODULE,
	},

	.probe = wm9705_probe,
	.remove = __devexit_p(wm9705_remove),
	};

	module_platform_driver(wm9705_codec_driver);

	MODULE_DESCRIPTION("ASoC WM9705 driver");
	MODULE_AUTHOR("Ian Molton");
	MODULE_LICENSE("GPL v2");