forked from Minki/linux
396 lines
9.5 KiB
C
396 lines
9.5 KiB
C
/*
|
|
* max9850.c -- codec driver for max9850
|
|
*
|
|
* Copyright (C) 2011 taskit GmbH
|
|
*
|
|
* Author: Christian Glindkamp <christian.glindkamp@taskit.de>
|
|
*
|
|
* Initial development of this code was funded by
|
|
* MICRONIC Computer Systeme GmbH, http://www.mcsberlin.de/
|
|
*
|
|
* 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; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/tlv.h>
|
|
|
|
#include "max9850.h"
|
|
|
|
struct max9850_priv {
|
|
struct regmap *regmap;
|
|
unsigned int sysclk;
|
|
};
|
|
|
|
/* max9850 register cache */
|
|
static const struct reg_default max9850_reg[] = {
|
|
{ 2, 0x0c },
|
|
{ 3, 0x00 },
|
|
{ 4, 0x00 },
|
|
{ 5, 0x00 },
|
|
{ 6, 0x00 },
|
|
{ 7, 0x00 },
|
|
{ 8, 0x00 },
|
|
{ 9, 0x00 },
|
|
{ 10, 0x00 },
|
|
};
|
|
|
|
/* these registers are not used at the moment but provided for the sake of
|
|
* completeness */
|
|
static bool max9850_volatile_register(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case MAX9850_STATUSA:
|
|
case MAX9850_STATUSB:
|
|
return 1;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config max9850_regmap = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
|
|
.max_register = MAX9850_DIGITAL_AUDIO,
|
|
.volatile_reg = max9850_volatile_register,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
static const unsigned int max9850_tlv[] = {
|
|
TLV_DB_RANGE_HEAD(4),
|
|
0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
|
|
0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
|
|
0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
|
|
0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0),
|
|
};
|
|
|
|
static const struct snd_kcontrol_new max9850_controls[] = {
|
|
SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
|
|
SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
|
|
SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
|
|
};
|
|
|
|
static const struct snd_kcontrol_new max9850_mixer_controls[] = {
|
|
SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
|
|
SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
|
|
SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
|
|
SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
|
|
SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
|
|
SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
|
|
&max9850_mixer_controls[0],
|
|
ARRAY_SIZE(max9850_mixer_controls)),
|
|
SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
|
|
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
|
|
SND_SOC_DAPM_OUTPUT("OUTL"),
|
|
SND_SOC_DAPM_OUTPUT("HPL"),
|
|
SND_SOC_DAPM_OUTPUT("OUTR"),
|
|
SND_SOC_DAPM_OUTPUT("HPR"),
|
|
SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
|
|
SND_SOC_DAPM_INPUT("INL"),
|
|
SND_SOC_DAPM_INPUT("INR"),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
|
|
/* output mixer */
|
|
{"Output Mixer", NULL, "DAC"},
|
|
{"Output Mixer", "Line In Switch", "Line Input"},
|
|
|
|
/* outputs */
|
|
{"Headphone Output", NULL, "Output Mixer"},
|
|
{"HPL", NULL, "Headphone Output"},
|
|
{"HPR", NULL, "Headphone Output"},
|
|
{"OUTL", NULL, "Output Mixer"},
|
|
{"OUTR", NULL, "Output Mixer"},
|
|
|
|
/* inputs */
|
|
{"Line Input", NULL, "INL"},
|
|
{"Line Input", NULL, "INR"},
|
|
|
|
/* supplies */
|
|
{"Output Mixer", NULL, "Charge Pump 1"},
|
|
{"Output Mixer", NULL, "Charge Pump 2"},
|
|
{"Output Mixer", NULL, "SHDN"},
|
|
{"DAC", NULL, "MCLK"},
|
|
};
|
|
|
|
static int max9850_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 max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
|
|
u64 lrclk_div;
|
|
u8 sf, da;
|
|
|
|
if (!max9850->sysclk)
|
|
return -EINVAL;
|
|
|
|
/* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
|
|
sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1;
|
|
lrclk_div = (1 << 22);
|
|
lrclk_div *= params_rate(params);
|
|
lrclk_div *= sf;
|
|
do_div(lrclk_div, max9850->sysclk);
|
|
|
|
snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
|
|
snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
|
|
|
|
switch (params_width(params)) {
|
|
case 16:
|
|
da = 0;
|
|
break;
|
|
case 20:
|
|
da = 0x2;
|
|
break;
|
|
case 24:
|
|
da = 0x3;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max9850_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 max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
|
|
|
|
/* calculate mclk -> iclk divider */
|
|
if (freq <= 13000000)
|
|
snd_soc_write(codec, MAX9850_CLOCK, 0x0);
|
|
else if (freq <= 26000000)
|
|
snd_soc_write(codec, MAX9850_CLOCK, 0x4);
|
|
else if (freq <= 40000000)
|
|
snd_soc_write(codec, MAX9850_CLOCK, 0x8);
|
|
else
|
|
return -EINVAL;
|
|
|
|
max9850->sysclk = freq;
|
|
return 0;
|
|
}
|
|
|
|
static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
|
|
{
|
|
struct snd_soc_codec *codec = codec_dai->codec;
|
|
u8 da = 0;
|
|
|
|
/* set master/slave audio interface */
|
|
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
|
|
case SND_SOC_DAIFMT_CBM_CFM:
|
|
da |= MAX9850_MASTER;
|
|
break;
|
|
case SND_SOC_DAIFMT_CBS_CFS:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* interface format */
|
|
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
|
|
case SND_SOC_DAIFMT_I2S:
|
|
da |= MAX9850_DLY;
|
|
break;
|
|
case SND_SOC_DAIFMT_RIGHT_J:
|
|
da |= MAX9850_RTJ;
|
|
break;
|
|
case SND_SOC_DAIFMT_LEFT_J:
|
|
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:
|
|
da |= MAX9850_BCINV | MAX9850_INV;
|
|
break;
|
|
case SND_SOC_DAIFMT_IB_NF:
|
|
da |= MAX9850_BCINV;
|
|
break;
|
|
case SND_SOC_DAIFMT_NB_IF:
|
|
da |= MAX9850_INV;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* set da */
|
|
snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max9850_set_bias_level(struct snd_soc_codec *codec,
|
|
enum snd_soc_bias_level level)
|
|
{
|
|
struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
|
|
int ret;
|
|
|
|
switch (level) {
|
|
case SND_SOC_BIAS_ON:
|
|
break;
|
|
case SND_SOC_BIAS_PREPARE:
|
|
break;
|
|
case SND_SOC_BIAS_STANDBY:
|
|
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
|
|
ret = regcache_sync(max9850->regmap);
|
|
if (ret) {
|
|
dev_err(codec->dev,
|
|
"Failed to sync cache: %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
break;
|
|
case SND_SOC_BIAS_OFF:
|
|
break;
|
|
}
|
|
codec->dapm.bias_level = level;
|
|
return 0;
|
|
}
|
|
|
|
#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
|
|
|
|
#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
|
|
SNDRV_PCM_FMTBIT_S24_LE)
|
|
|
|
static const struct snd_soc_dai_ops max9850_dai_ops = {
|
|
.hw_params = max9850_hw_params,
|
|
.set_sysclk = max9850_set_dai_sysclk,
|
|
.set_fmt = max9850_set_dai_fmt,
|
|
};
|
|
|
|
static struct snd_soc_dai_driver max9850_dai = {
|
|
.name = "max9850-hifi",
|
|
.playback = {
|
|
.stream_name = "Playback",
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = MAX9850_RATES,
|
|
.formats = MAX9850_FORMATS
|
|
},
|
|
.ops = &max9850_dai_ops,
|
|
};
|
|
|
|
#ifdef CONFIG_PM
|
|
static int max9850_suspend(struct snd_soc_codec *codec)
|
|
{
|
|
max9850_set_bias_level(codec, SND_SOC_BIAS_OFF);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max9850_resume(struct snd_soc_codec *codec)
|
|
{
|
|
max9850_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define max9850_suspend NULL
|
|
#define max9850_resume NULL
|
|
#endif
|
|
|
|
static int max9850_probe(struct snd_soc_codec *codec)
|
|
{
|
|
int ret;
|
|
|
|
ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* enable zero-detect */
|
|
snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1);
|
|
/* enable slew-rate control */
|
|
snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40);
|
|
/* set slew-rate 125ms */
|
|
snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_soc_codec_driver soc_codec_dev_max9850 = {
|
|
.probe = max9850_probe,
|
|
.suspend = max9850_suspend,
|
|
.resume = max9850_resume,
|
|
.set_bias_level = max9850_set_bias_level,
|
|
|
|
.controls = max9850_controls,
|
|
.num_controls = ARRAY_SIZE(max9850_controls),
|
|
.dapm_widgets = max9850_dapm_widgets,
|
|
.num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),
|
|
.dapm_routes = max9850_dapm_routes,
|
|
.num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),
|
|
};
|
|
|
|
static int max9850_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct max9850_priv *max9850;
|
|
int ret;
|
|
|
|
max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),
|
|
GFP_KERNEL);
|
|
if (max9850 == NULL)
|
|
return -ENOMEM;
|
|
|
|
max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
|
|
if (IS_ERR(max9850->regmap))
|
|
return PTR_ERR(max9850->regmap);
|
|
|
|
i2c_set_clientdata(i2c, max9850);
|
|
|
|
ret = snd_soc_register_codec(&i2c->dev,
|
|
&soc_codec_dev_max9850, &max9850_dai, 1);
|
|
return ret;
|
|
}
|
|
|
|
static int max9850_i2c_remove(struct i2c_client *client)
|
|
{
|
|
snd_soc_unregister_codec(&client->dev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id max9850_i2c_id[] = {
|
|
{ "max9850", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
|
|
|
|
static struct i2c_driver max9850_i2c_driver = {
|
|
.driver = {
|
|
.name = "max9850",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = max9850_i2c_probe,
|
|
.remove = max9850_i2c_remove,
|
|
.id_table = max9850_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(max9850_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
|
|
MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
|
|
MODULE_LICENSE("GPL");
|