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linux/sound/soc/codecs/ad1836.c
Bhumika Goyal a180ba45b1 ASoC: codecs: add const to snd_soc_codec_driver structures 
Declare snd_soc_codec_driver structures as const as they are only passed
as an argument to the function snd_soc_register_codec. This argument is
of type const, so declare the structures with this property as const.
In file codecs/sn95031.c, snd_soc_codec_driver structure is also used in
a copy operation along with getting passed to snd_soc_register_codec.
So, it can be made const too.
Done using Coccinelle:

@match disable optional_qualifier@
identifier s;
position p;
@@
static struct snd_soc_codec_driver s@p={...};

@good1@
identifier match.s;
position p;
@@
snd_soc_register_codec(...,&s@p,...)

@bad@
identifier match.s;
position p!={match.p,good1.p};
@@
s@p

@depends on !bad disable optional_qualifier@
identifier match.s;
@@
static
+const
struct snd_soc_codec_driver s={...};

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-08-10 16:10:50 +01:00

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/*
* Audio Codec driver supporting:
* AD1835A, AD1836, AD1837A, AD1838A, AD1839A
*
* Copyright 2009-2011 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#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/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include "ad1836.h"
enum ad1836_type {
AD1835,
AD1836,
AD1838,
};
/* codec private data */
struct ad1836_priv {
enum ad1836_type type;
struct regmap *regmap;
};
/*
* AD1836 volume/mute/de-emphasis etc. controls
*/
static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};
static SOC_ENUM_SINGLE_DECL(ad1836_deemp_enum,
AD1836_DAC_CTRL1, 8, ad1836_deemp);
#define AD1836_DAC_VOLUME(x) \
SOC_DOUBLE_R("DAC" #x " Playback Volume", AD1836_DAC_L_VOL(x), \
AD1836_DAC_R_VOL(x), 0, 0x3FF, 0)
#define AD1836_DAC_SWITCH(x) \
SOC_DOUBLE("DAC" #x " Playback Switch", AD1836_DAC_CTRL2, \
AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)
#define AD1836_ADC_SWITCH(x) \
SOC_DOUBLE("ADC" #x " Capture Switch", AD1836_ADC_CTRL2, \
AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)
static const struct snd_kcontrol_new ad183x_dac_controls[] = {
AD1836_DAC_VOLUME(1),
AD1836_DAC_SWITCH(1),
AD1836_DAC_VOLUME(2),
AD1836_DAC_SWITCH(2),
AD1836_DAC_VOLUME(3),
AD1836_DAC_SWITCH(3),
AD1836_DAC_VOLUME(4),
AD1836_DAC_SWITCH(4),
};
static const struct snd_soc_dapm_widget ad183x_dac_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("DAC1OUT"),
SND_SOC_DAPM_OUTPUT("DAC2OUT"),
SND_SOC_DAPM_OUTPUT("DAC3OUT"),
SND_SOC_DAPM_OUTPUT("DAC4OUT"),
};
static const struct snd_soc_dapm_route ad183x_dac_routes[] = {
{ "DAC1OUT", NULL, "DAC" },
{ "DAC2OUT", NULL, "DAC" },
{ "DAC3OUT", NULL, "DAC" },
{ "DAC4OUT", NULL, "DAC" },
};
static const struct snd_kcontrol_new ad183x_adc_controls[] = {
AD1836_ADC_SWITCH(1),
AD1836_ADC_SWITCH(2),
AD1836_ADC_SWITCH(3),
};
static const struct snd_soc_dapm_widget ad183x_adc_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("ADC1IN"),
SND_SOC_DAPM_INPUT("ADC2IN"),
};
static const struct snd_soc_dapm_route ad183x_adc_routes[] = {
{ "ADC", NULL, "ADC1IN" },
{ "ADC", NULL, "ADC2IN" },
};
static const struct snd_kcontrol_new ad183x_controls[] = {
/* ADC high-pass filter */
SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
AD1836_ADC_HIGHPASS_FILTER, 1, 0),
/* DAC de-emphasis */
SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
};
static const struct snd_soc_dapm_widget ad183x_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
AD1836_DAC_POWERDOWN, 1),
SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
AD1836_ADC_POWERDOWN, 1, NULL, 0),
};
static const struct snd_soc_dapm_route ad183x_dapm_routes[] = {
{ "DAC", NULL, "ADC_PWR" },
{ "ADC", NULL, "ADC_PWR" },
};
static const DECLARE_TLV_DB_SCALE(ad1836_in_tlv, 0, 300, 0);
static const struct snd_kcontrol_new ad1836_controls[] = {
SOC_DOUBLE_TLV("ADC2 Capture Volume", AD1836_ADC_CTRL1, 3, 0, 4, 0,
ad1836_in_tlv),
};
/*
* DAI ops entries
*/
static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
/* at present, we support adc aux mode to interface with
* blackfin sport tdm mode
*/
case SND_SOC_DAIFMT_DSP_A:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_IB_IF:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
/* ALCLK,ABCLK are both output, AD1836 can only be master */
case SND_SOC_DAIFMT_CBM_CFM:
break;
default:
return -EINVAL;
}
return 0;
}
static int ad1836_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(dai->codec);
int word_len = 0;
/* bit size */
switch (params_width(params)) {
case 16:
word_len = AD1836_WORD_LEN_16;
break;
case 20:
word_len = AD1836_WORD_LEN_20;
break;
case 24:
case 32:
word_len = AD1836_WORD_LEN_24;
break;
default:
return -EINVAL;
}
regmap_update_bits(ad1836->regmap, AD1836_DAC_CTRL1,
AD1836_DAC_WORD_LEN_MASK,
word_len << AD1836_DAC_WORD_LEN_OFFSET);
regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
AD1836_ADC_WORD_LEN_MASK,
word_len << AD1836_ADC_WORD_OFFSET);
return 0;
}
static const struct snd_soc_dai_ops ad1836_dai_ops = {
.hw_params = ad1836_hw_params,
.set_fmt = ad1836_set_dai_fmt,
};
#define AD183X_DAI(_name, num_dacs, num_adcs) \
{ \
.name = _name "-hifi", \
.playback = { \
.stream_name = "Playback", \
.channels_min = 2, \
.channels_max = (num_dacs) * 2, \
.rates = SNDRV_PCM_RATE_48000, \
.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
}, \
.capture = { \
.stream_name = "Capture", \
.channels_min = 2, \
.channels_max = (num_adcs) * 2, \
.rates = SNDRV_PCM_RATE_48000, \
.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
}, \
.ops = &ad1836_dai_ops, \
}
static struct snd_soc_dai_driver ad183x_dais[] = {
[AD1835] = AD183X_DAI("ad1835", 4, 1),
[AD1836] = AD183X_DAI("ad1836", 3, 2),
[AD1838] = AD183X_DAI("ad1838", 3, 1),
};
#ifdef CONFIG_PM
static int ad1836_suspend(struct snd_soc_codec *codec)
{
struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
/* reset clock control mode */
return regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
AD1836_ADC_SERFMT_MASK, 0);
}
static int ad1836_resume(struct snd_soc_codec *codec)
{
struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
/* restore clock control mode */
return regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
AD1836_ADC_SERFMT_MASK, AD1836_ADC_AUX);
}
#else
#define ad1836_suspend NULL
#define ad1836_resume NULL
#endif
static int ad1836_probe(struct snd_soc_codec *codec)
{
struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
int num_dacs, num_adcs;
int ret = 0;
int i;
num_dacs = ad183x_dais[ad1836->type].playback.channels_max / 2;
num_adcs = ad183x_dais[ad1836->type].capture.channels_max / 2;
/* default setting for ad1836 */
/* de-emphasis: 48kHz, power-on dac */
regmap_write(ad1836->regmap, AD1836_DAC_CTRL1, 0x300);
/* unmute dac channels */
regmap_write(ad1836->regmap, AD1836_DAC_CTRL2, 0x0);
/* high-pass filter enable, power-on adc */
regmap_write(ad1836->regmap, AD1836_ADC_CTRL1, 0x100);
/* unmute adc channles, adc aux mode */
regmap_write(ad1836->regmap, AD1836_ADC_CTRL2, 0x180);
/* volume */
for (i = 1; i <= num_dacs; ++i) {
regmap_write(ad1836->regmap, AD1836_DAC_L_VOL(i), 0x3FF);
regmap_write(ad1836->regmap, AD1836_DAC_R_VOL(i), 0x3FF);
}
if (ad1836->type == AD1836) {
/* left/right diff:PGA/MUX */
regmap_write(ad1836->regmap, AD1836_ADC_CTRL3, 0x3A);
ret = snd_soc_add_codec_controls(codec, ad1836_controls,
ARRAY_SIZE(ad1836_controls));
if (ret)
return ret;
} else {
regmap_write(ad1836->regmap, AD1836_ADC_CTRL3, 0x00);
}
ret = snd_soc_add_codec_controls(codec, ad183x_dac_controls, num_dacs * 2);
if (ret)
return ret;
ret = snd_soc_add_codec_controls(codec, ad183x_adc_controls, num_adcs);
if (ret)
return ret;
ret = snd_soc_dapm_new_controls(dapm, ad183x_dac_dapm_widgets, num_dacs);
if (ret)
return ret;
ret = snd_soc_dapm_new_controls(dapm, ad183x_adc_dapm_widgets, num_adcs);
if (ret)
return ret;
ret = snd_soc_dapm_add_routes(dapm, ad183x_dac_routes, num_dacs);
if (ret)
return ret;
ret = snd_soc_dapm_add_routes(dapm, ad183x_adc_routes, num_adcs);
if (ret)
return ret;
return ret;
}
/* power down chip */
static int ad1836_remove(struct snd_soc_codec *codec)
{
struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
/* reset clock control mode */
return regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
AD1836_ADC_SERFMT_MASK, 0);
}
static const struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
.probe = ad1836_probe,
.remove = ad1836_remove,
.suspend = ad1836_suspend,
.resume = ad1836_resume,
.component_driver = {
.controls = ad183x_controls,
.num_controls = ARRAY_SIZE(ad183x_controls),
.dapm_widgets = ad183x_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ad183x_dapm_widgets),
.dapm_routes = ad183x_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(ad183x_dapm_routes),
},
};
static const struct reg_default ad1836_reg_defaults[] = {
{ AD1836_DAC_CTRL1, 0x0000 },
{ AD1836_DAC_CTRL2, 0x0000 },
{ AD1836_DAC_L_VOL(0), 0x0000 },
{ AD1836_DAC_R_VOL(0), 0x0000 },
{ AD1836_DAC_L_VOL(1), 0x0000 },
{ AD1836_DAC_R_VOL(1), 0x0000 },
{ AD1836_DAC_L_VOL(2), 0x0000 },
{ AD1836_DAC_R_VOL(2), 0x0000 },
{ AD1836_DAC_L_VOL(3), 0x0000 },
{ AD1836_DAC_R_VOL(3), 0x0000 },
{ AD1836_ADC_CTRL1, 0x0000 },
{ AD1836_ADC_CTRL2, 0x0000 },
{ AD1836_ADC_CTRL3, 0x0000 },
};
static const struct regmap_config ad1836_regmap_config = {
.val_bits = 12,
.reg_bits = 4,
.read_flag_mask = 0x08,
.max_register = AD1836_ADC_CTRL3,
.reg_defaults = ad1836_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(ad1836_reg_defaults),
.cache_type = REGCACHE_RBTREE,
};
static int ad1836_spi_probe(struct spi_device *spi)
{
struct ad1836_priv *ad1836;
int ret;
ad1836 = devm_kzalloc(&spi->dev, sizeof(struct ad1836_priv),
GFP_KERNEL);
if (ad1836 == NULL)
return -ENOMEM;
ad1836->regmap = devm_regmap_init_spi(spi, &ad1836_regmap_config);
if (IS_ERR(ad1836->regmap))
return PTR_ERR(ad1836->regmap);
ad1836->type = spi_get_device_id(spi)->driver_data;
spi_set_drvdata(spi, ad1836);
ret = snd_soc_register_codec(&spi->dev,
&soc_codec_dev_ad1836, &ad183x_dais[ad1836->type], 1);
return ret;
}
static int ad1836_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(&spi->dev);
return 0;
}
static const struct spi_device_id ad1836_ids[] = {
{ "ad1835", AD1835 },
{ "ad1836", AD1836 },
{ "ad1837", AD1835 },
{ "ad1838", AD1838 },
{ "ad1839", AD1838 },
{ },
};
MODULE_DEVICE_TABLE(spi, ad1836_ids);
static struct spi_driver ad1836_spi_driver = {
.driver = {
.name = "ad1836",
},
.probe = ad1836_spi_probe,
.remove = ad1836_spi_remove,
.id_table = ad1836_ids,
};
module_spi_driver(ad1836_spi_driver);
MODULE_DESCRIPTION("ASoC ad1836 driver");
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_LICENSE("GPL");
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