/*
* ak4535.c -- AK4535 ALSA Soc Audio driver
*
* Copyright 2005 Openedhand Ltd.
*
* Author: Richard Purdie <richard@openedhand.com>
*
* Based on wm8753.c by Liam Girdwood
*
* 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/regmap.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 "ak4535.h"
/* codec private data */
struct ak4535_priv {
struct regmap *regmap;
unsigned int sysclk;
};
/*
* ak4535 register cache
*/
static const struct reg_default ak4535_reg_defaults[] = {
{ 0, 0x00 },
{ 1, 0x80 },
{ 2, 0x00 },
{ 3, 0x03 },
{ 4, 0x02 },
{ 5, 0x00 },
{ 6, 0x11 },
{ 7, 0x01 },
{ 8, 0x00 },
{ 9, 0x40 },
{ 10, 0x36 },
{ 11, 0x10 },
{ 12, 0x00 },
{ 13, 0x00 },
{ 14, 0x57 },
};
static bool ak4535_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case AK4535_STATUS:
return true;
default:
return false;
}
}
static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
static const char *ak4535_mic_select[] = {"Internal", "External"};
static const struct soc_enum ak4535_enum[] = {
SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
};
static const struct snd_kcontrol_new ak4535_snd_controls[] = {
SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
SOC_ENUM("Headphone Output", ak4535_enum[2]),
SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
SOC_ENUM("Mic Select", ak4535_enum[4]),
SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
};
/* Mono 1 Mixer */
static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
};
/* Stereo Mixer */
static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
};
/* Input Mixer */
static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
};
/* Input mux */
static const struct snd_kcontrol_new ak4535_input_mux_control =
SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
/* HP L switch */
static const struct snd_kcontrol_new ak4535_hpl_control =
SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
/* HP R switch */
static const struct snd_kcontrol_new ak4535_hpr_control =
SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
/* mono 2 switch */
static const struct snd_kcontrol_new ak4535_mono2_control =
SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
/* Line out switch */
static const struct snd_kcontrol_new ak4535_line_control =
SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
/* ak4535 dapm widgets */
static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
&ak4535_stereo_mixer_controls[0],
ARRAY_SIZE(ak4535_stereo_mixer_controls)),
SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
&ak4535_mono1_mixer_controls[0],
ARRAY_SIZE(ak4535_mono1_mixer_controls)),
SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
&ak4535_input_mixer_controls[0],
ARRAY_SIZE(ak4535_input_mixer_controls)),
SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
&ak4535_input_mux_control),
SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
&ak4535_mono2_control),
/* speaker powersave bit */
SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
&ak4535_line_control),
SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
&ak4535_hpl_control),
SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
&ak4535_hpr_control),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("HPL"),
SND_SOC_DAPM_OUTPUT("ROUT"),
SND_SOC_DAPM_OUTPUT("HPR"),
SND_SOC_DAPM_OUTPUT("SPP"),
SND_SOC_DAPM_OUTPUT("SPN"),
SND_SOC_DAPM_OUTPUT("MOUT1"),
SND_SOC_DAPM_OUTPUT("MOUT2"),
SND_SOC_DAPM_OUTPUT("MICOUT"),
SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
SND_SOC_DAPM_INPUT("MICIN"),
SND_SOC_DAPM_INPUT("MICEXT"),
SND_SOC_DAPM_INPUT("AUX"),
SND_SOC_DAPM_INPUT("MIN"),
SND_SOC_DAPM_INPUT("AIN"),
};
static const struct snd_soc_dapm_route ak4535_audio_map[] = {
/*stereo mixer */
{"Stereo Mixer", "Playback Switch", "DAC"},
{"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
{"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
/* mono1 mixer */
{"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
{"Mono1 Mixer", "Mono Playback Switch", "DAC"},
/* Mic */
{"Mic", NULL, "AIN"},
{"Input Mux", "Internal", "Mic Int Bias"},
{"Input Mux", "External", "Mic Ext Bias"},
{"Mic Int Bias", NULL, "MICIN"},
{"Mic Ext Bias", NULL, "MICEXT"},
{"MICOUT", NULL, "Input Mux"},
/* line out */
{"LOUT", NULL, "Line Out Enable"},
{"ROUT", NULL, "Line Out Enable"},
{"Line Out Enable", "Switch", "Line Out"},
{"Line Out", NULL, "Stereo Mixer"},
/* mono1 out */
{"MOUT1", NULL, "Mono Out"},
{"Mono Out", NULL, "Mono1 Mixer"},
/* left HP */
{"HPL", NULL, "Left HP Enable"},
{"Left HP Enable", "Switch", "HP L Amp"},
{"HP L Amp", NULL, "Stereo Mixer"},
/* right HP */
{"HPR", NULL, "Right HP Enable"},
{"Right HP Enable", "Switch", "HP R Amp"},
{"HP R Amp", NULL, "Stereo Mixer"},
/* speaker */
{"SPP", NULL, "Speaker Enable"},
{"SPN", NULL, "Speaker Enable"},
{"Speaker Enable", "Switch", "Spk Amp"},
{"Spk Amp", NULL, "MIN"},
/* mono 2 */
{"MOUT2", NULL, "Mono 2 Enable"},
{"Mono 2 Enable", "Switch", "Stereo Mixer"},
/* Aux In */
{"Aux In", NULL, "AUX"},
/* ADC */
{"ADC", NULL, "Input Mixer"},
{"Input Mixer", "Mic Capture Switch", "Mic"},
{"Input Mixer", "Aux Capture Switch", "Aux In"},
};
static int ak4535_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 ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
ak4535->sysclk = freq;
return 0;
}
static int ak4535_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
u8 mode2 = snd_soc_read(codec, AK4535_MODE2) & ~(0x3 << 5);
int rate = params_rate(params), fs = 256;
if (rate)
fs = ak4535->sysclk / rate;
/* set fs */
switch (fs) {
case 1024:
mode2 |= (0x2 << 5);
break;
case 512:
mode2 |= (0x1 << 5);
break;
case 256:
break;
}
/* set rate */
snd_soc_write(codec, AK4535_MODE2, mode2);
return 0;
}
static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u8 mode1 = 0;
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
mode1 = 0x0002;
break;
case SND_SOC_DAIFMT_LEFT_J:
mode1 = 0x0001;
break;
default:
return -EINVAL;
}
/* use 32 fs for BCLK to save power */
mode1 |= 0x4;
snd_soc_write(codec, AK4535_MODE1, mode1);
return 0;
}
static int ak4535_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = snd_soc_read(codec, AK4535_DAC);
if (!mute)
snd_soc_write(codec, AK4535_DAC, mute_reg & ~0x20);
else
snd_soc_write(codec, AK4535_DAC, mute_reg | 0x20);
return 0;
}
static int ak4535_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
switch (level) {
case SND_SOC_BIAS_ON:
snd_soc_update_bits(codec, AK4535_DAC, 0x20, 0);
break;
case SND_SOC_BIAS_PREPARE:
snd_soc_update_bits(codec, AK4535_DAC, 0x20, 0x20);
break;
case SND_SOC_BIAS_STANDBY:
snd_soc_update_bits(codec, AK4535_PM1, 0x80, 0x80);
snd_soc_update_bits(codec, AK4535_PM2, 0x80, 0);
break;
case SND_SOC_BIAS_OFF:
snd_soc_update_bits(codec, AK4535_PM1, 0x80, 0);
break;
}
codec->dapm.bias_level = level;
return 0;
}
#define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
static const struct snd_soc_dai_ops ak4535_dai_ops = {
.hw_params = ak4535_hw_params,
.set_fmt = ak4535_set_dai_fmt,
.digital_mute = ak4535_mute,
.set_sysclk = ak4535_set_dai_sysclk,
};
static struct snd_soc_dai_driver ak4535_dai = {
.name = "ak4535-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = AK4535_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = AK4535_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
.ops = &ak4535_dai_ops,
};
static int ak4535_suspend(struct snd_soc_codec *codec)
{
ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int ak4535_resume(struct snd_soc_codec *codec)
{
snd_soc_cache_sync(codec);
ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int ak4535_probe(struct snd_soc_codec *codec)
{
/* power on device */
ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
snd_soc_add_codec_controls(codec, ak4535_snd_controls,
ARRAY_SIZE(ak4535_snd_controls));
return 0;
}
/* power down chip */
static int ak4535_remove(struct snd_soc_codec *codec)
{
ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static const struct regmap_config ak4535_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = AK4535_STATUS,
.volatile_reg = ak4535_volatile,
.cache_type = REGCACHE_RBTREE,
.reg_defaults = ak4535_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(ak4535_reg_defaults),
};
static struct snd_soc_codec_driver soc_codec_dev_ak4535 = {
.probe = ak4535_probe,
.remove = ak4535_remove,
.suspend = ak4535_suspend,
.resume = ak4535_resume,
.set_bias_level = ak4535_set_bias_level,
.dapm_widgets = ak4535_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ak4535_dapm_widgets),
.dapm_routes = ak4535_audio_map,
.num_dapm_routes = ARRAY_SIZE(ak4535_audio_map),
};
static int ak4535_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct ak4535_priv *ak4535;
int ret;
ak4535 = devm_kzalloc(&i2c->dev, sizeof(struct ak4535_priv),
GFP_KERNEL);
if (ak4535 == NULL)
return -ENOMEM;
ak4535->regmap = devm_regmap_init_i2c(i2c, &ak4535_regmap);
if (IS_ERR(ak4535->regmap)) {
ret = PTR_ERR(ak4535->regmap);
dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
return ret;
}
i2c_set_clientdata(i2c, ak4535);
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_ak4535, &ak4535_dai, 1);
return ret;
}
static int ak4535_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
static const struct i2c_device_id ak4535_i2c_id[] = {
{ "ak4535", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
static struct i2c_driver ak4535_i2c_driver = {
.driver = {
.name = "ak4535",
.owner = THIS_MODULE,
},
.probe = ak4535_i2c_probe,
.remove = ak4535_i2c_remove,
.id_table = ak4535_i2c_id,
};
module_i2c_driver(ak4535_i2c_driver);
MODULE_DESCRIPTION("Soc AK4535 driver");
MODULE_AUTHOR("Richard Purdie");
MODULE_LICENSE("GPL");
