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linux/sound/soc/codecs/max9850.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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/
*/
#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 true;
default:
return false;
}
}
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 DECLARE_TLV_DB_RANGE(max9850_tlv,
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_component *component = dai->component;
struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
u64 lrclk_div;
u8 sf, da;
if (!max9850->sysclk)
return -EINVAL;
/* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
sf = (snd_soc_component_read32(component, MAX9850_CLOCK) >> 2) + 1;
lrclk_div = (1 << 22);
lrclk_div *= params_rate(params);
lrclk_div *= sf;
do_div(lrclk_div, max9850->sysclk);
snd_soc_component_write(component, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
snd_soc_component_write(component, 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_component_update_bits(component, 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_component *component = codec_dai->component;
struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
/* calculate mclk -> iclk divider */
if (freq <= 13000000)
snd_soc_component_write(component, MAX9850_CLOCK, 0x0);
else if (freq <= 26000000)
snd_soc_component_write(component, MAX9850_CLOCK, 0x4);
else if (freq <= 40000000)
snd_soc_component_write(component, 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_component *component = codec_dai->component;
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_component_write(component, MAX9850_DIGITAL_AUDIO, da);
return 0;
}
static int max9850_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
int ret;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
ret = regcache_sync(max9850->regmap);
if (ret) {
dev_err(component->dev,
"Failed to sync cache: %d\n", ret);
return ret;
}
}
break;
case SND_SOC_BIAS_OFF:
break;
}
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,
};
static int max9850_probe(struct snd_soc_component *component)
{
/* enable zero-detect */
snd_soc_component_update_bits(component, MAX9850_GENERAL_PURPOSE, 1, 1);
/* enable slew-rate control */
snd_soc_component_update_bits(component, MAX9850_VOLUME, 0x40, 0x40);
/* set slew-rate 125ms */
snd_soc_component_update_bits(component, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
return 0;
}
static const struct snd_soc_component_driver soc_component_dev_max9850 = {
.probe = max9850_probe,
.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),
.suspend_bias_off = 1,
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
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 = devm_snd_soc_register_component(&i2c->dev,
&soc_component_dev_max9850, &max9850_dai, 1);
return ret;
}
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",
},
.probe = max9850_i2c_probe,
.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");
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