Commit 2aceefef authored by Ian Molton's avatar Ian Molton Committed by Mark Brown
Browse files

ASoC: Driver for the WM9705 AC97 codec. 



This driver adds support for the wm9705 ac97 codec. The driver supports
audio input and output.

Signed-off-by: default avatarIan Molton <ian@mnementh.co.uk>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent ac37373b

sound/soc/codecs/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ config SND_SOC_ALL_CODECS 
	select SND_SOC_WM8903 if I2C

	select SND_SOC_WM8971 if I2C

	select SND_SOC_WM8990 if I2C

	select SND_SOC_WM9705 if SND_SOC_AC97_BUS

	select SND_SOC_WM9712 if SND_SOC_AC97_BUS

	select SND_SOC_WM9713 if SND_SOC_AC97_BUS

        help
@@ -144,6 +145,9 @@ config SND_SOC_WM8971 
config SND_SOC_WM8990

	tristate



config SND_SOC_WM9705

	tristate



config SND_SOC_WM9712

	tristate

sound/soc/codecs/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ snd-soc-wm8900-objs := wm8900.o 
snd-soc-wm8903-objs := wm8903.o

snd-soc-wm8971-objs := wm8971.o

snd-soc-wm8990-objs := wm8990.o

snd-soc-wm9705-objs := wm9705.o

snd-soc-wm9712-objs := wm9712.o

snd-soc-wm9713-objs := wm9713.o
@@ -51,5 +52,7 @@ obj-$(CONFIG_SND_SOC_WM8900) += snd-soc-wm8900.o 
obj-$(CONFIG_SND_SOC_WM8903)	+= snd-soc-wm8903.o

obj-$(CONFIG_SND_SOC_WM8971)	+= snd-soc-wm8971.o

obj-$(CONFIG_SND_SOC_WM8990)	+= snd-soc-wm8990.o

obj-$(CONFIG_SND_SOC_WM8991)	+= snd-soc-wm8991.o

obj-$(CONFIG_SND_SOC_WM9705)	+= snd-soc-wm9705.o

obj-$(CONFIG_SND_SOC_WM9712)	+= snd-soc-wm9712.o

obj-$(CONFIG_SND_SOC_WM9713)	+= snd-soc-wm9713.o

sound/soc/codecs/wm9705.c

0 → 100644
+410 −0
Original line number Diff line number Diff line 
/*

 * 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/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 <sound/soc-dapm.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("PCM Capture Volume", AC97_REC_GAIN, 8, 0, 15, 0),

	SOC_SINGLE("PCM 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 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"},

};



static int wm9705_add_widgets(struct snd_soc_codec *codec)

{

	snd_soc_dapm_new_controls(codec, wm9705_dapm_widgets,

					ARRAY_SIZE(wm9705_dapm_widgets));

	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

	snd_soc_dapm_new_widgets(codec);



	return 0;

}



/* 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_device *socdev = rtd->socdev;

	struct snd_soc_codec *codec = socdev->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)



struct snd_soc_dai wm9705_dai[] = {

	{

		.name = "AC97 HiFi",

		.ac97_control = 1,

		.playback = {

			.stream_name = "HiFi Playback",

			.channels_min = 1,

			.channels_max = 2,

			.rates = WM9705_AC97_RATES,

			.formats = SNDRV_PCM_FMTBIT_S16_LE,

		},

		.capture = {

			.stream_name = "HiFi Capture",

			.channels_min = 1,

			.channels_max = 2,

			.rates = WM9705_AC97_RATES,

			.formats = SNDRV_PCM_FMTBIT_S16_LE,

		},

		.ops = {

			.prepare = ac97_prepare,

		},

	},

	{

		.name = "AC97 Aux",

		.playback = {

			.stream_name = "Aux Playback",

			.channels_min = 1,

			.channels_max = 1,

			.rates = WM9705_AC97_RATES,

			.formats = SNDRV_PCM_FMTBIT_S16_LE,

		},

	}

};

EXPORT_SYMBOL_GPL(wm9705_dai);



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;

}



static int wm9705_soc_probe(struct platform_device *pdev)

{

	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	struct snd_soc_codec *codec;

	int ret = 0;



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



	socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);

	if (socdev->codec == NULL)

		return -ENOMEM;

	codec = socdev->codec;

	mutex_init(&codec->mutex);



	codec->reg_cache = kmemdup(wm9705_reg, sizeof(wm9705_reg), GFP_KERNEL);

	if (codec->reg_cache == NULL) {

		ret = -ENOMEM;

		goto cache_err;

	}

	codec->reg_cache_size = sizeof(wm9705_reg);

	codec->reg_cache_step = 2;



	codec->name = "WM9705";

	codec->owner = THIS_MODULE;

	codec->dai = wm9705_dai;

	codec->num_dai = ARRAY_SIZE(wm9705_dai);

	codec->write = ac97_write;

	codec->read = ac97_read;

	INIT_LIST_HEAD(&codec->dapm_widgets);

	INIT_LIST_HEAD(&codec->dapm_paths);



	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);

	if (ret < 0) {

		printk(KERN_ERR "wm9705: failed to register AC97 codec\n");

		goto codec_err;

	}



	/* register pcms */

	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);

	if (ret < 0)

		goto pcm_err;



	ret = wm9705_reset(codec);

	if (ret)

		goto reset_err;



	snd_soc_add_controls(codec, wm9705_snd_ac97_controls,

				ARRAY_SIZE(wm9705_snd_ac97_controls));

	wm9705_add_widgets(codec);



	ret = snd_soc_init_card(socdev);

	if (ret < 0) {

		printk(KERN_ERR "wm9705: failed to register card\n");

		goto pcm_err;

	}



	return 0;



reset_err:

	snd_soc_free_pcms(socdev);

pcm_err:

	snd_soc_free_ac97_codec(codec);

codec_err:

	kfree(codec->reg_cache);

cache_err:

	kfree(socdev->codec);

	socdev->codec = NULL;

	return ret;

}



static int wm9705_soc_remove(struct platform_device *pdev)

{

	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	struct snd_soc_codec *codec = socdev->codec;



	if (codec == NULL)

		return 0;



	snd_soc_dapm_free(socdev);

	snd_soc_free_pcms(socdev);

	snd_soc_free_ac97_codec(codec);

	kfree(codec->reg_cache);

	kfree(codec);

	return 0;

}



struct snd_soc_codec_device soc_codec_dev_wm9705 = {

	.probe = 	wm9705_soc_probe,

	.remove = 	wm9705_soc_remove,

};

EXPORT_SYMBOL_GPL(soc_codec_dev_wm9705);



MODULE_DESCRIPTION("ASoC WM9705 driver");

MODULE_AUTHOR("Ian Molton");

MODULE_LICENSE("GPL v2");

sound/soc/codecs/wm9705.h

0 → 100644
+14 −0
Original line number Diff line number Diff line 
/*

 * wm9705.h  --  WM9705 Soc Audio driver

 */



#ifndef _WM9705_H

#define _WM9705_H



#define WM9705_DAI_AC97_HIFI	0

#define WM9705_DAI_AC97_AUX	1



extern struct snd_soc_dai wm9705_dai[2];

extern struct snd_soc_codec_device soc_codec_dev_wm9705;



#endif