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linux-stable/sound/soc/codecs/cs4349.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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/*
* cs4349.c -- CS4349 ALSA Soc Audio driver
*
* Copyright 2015 Cirrus Logic, Inc.
*
* Authors: Tim Howe <Tim.Howe@cirrus.com>
*
* 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/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/of_device.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/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "cs4349.h"
static const struct reg_default cs4349_reg_defaults[] = {
{ 2, 0x00 }, /* r02 - Mode Control */
{ 3, 0x09 }, /* r03 - Volume, Mixing and Inversion Control */
{ 4, 0x81 }, /* r04 - Mute Control */
{ 5, 0x00 }, /* r05 - Channel A Volume Control */
{ 6, 0x00 }, /* r06 - Channel B Volume Control */
{ 7, 0xB1 }, /* r07 - Ramp and Filter Control */
{ 8, 0x1C }, /* r08 - Misc. Control */
};
/* Private data for the CS4349 */
struct cs4349_private {
struct regmap *regmap;
struct gpio_desc *reset_gpio;
unsigned int mode;
int rate;
};
static bool cs4349_readable_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CS4349_CHIPID ... CS4349_MISC:
return true;
default:
return false;
}
}
static bool cs4349_writeable_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CS4349_MODE ... CS4349_MISC:
return true;
default:
return false;
}
}
static int cs4349_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int format)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct cs4349_private *cs4349 = snd_soc_codec_get_drvdata(codec);
unsigned int fmt;
fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
switch (fmt) {
case SND_SOC_DAIFMT_I2S:
case SND_SOC_DAIFMT_LEFT_J:
case SND_SOC_DAIFMT_RIGHT_J:
cs4349->mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
break;
default:
return -EINVAL;
}
return 0;
}
static int cs4349_pcm_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 cs4349_private *cs4349 = snd_soc_codec_get_drvdata(codec);
int fmt, ret;
cs4349->rate = params_rate(params);
switch (cs4349->mode) {
case SND_SOC_DAIFMT_I2S:
fmt = DIF_I2S;
break;
case SND_SOC_DAIFMT_LEFT_J:
fmt = DIF_LEFT_JST;
break;
case SND_SOC_DAIFMT_RIGHT_J:
switch (params_width(params)) {
case 16:
fmt = DIF_RGHT_JST16;
break;
case 24:
fmt = DIF_RGHT_JST24;
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
ret = snd_soc_update_bits(codec, CS4349_MODE, DIF_MASK,
MODE_FORMAT(fmt));
if (ret < 0)
return ret;
return 0;
}
static int cs4349_digital_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
int reg;
reg = 0;
if (mute)
reg = MUTE_AB_MASK;
return snd_soc_update_bits(codec, CS4349_MUTE, MUTE_AB_MASK, reg);
}
static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0);
static const char * const chan_mix_texts[] = {
"Mute", "MuteA", "MuteA SwapB", "MuteA MonoB", "SwapA MuteB",
"BothR", "Swap", "SwapA MonoB", "MuteB", "Normal", "BothL",
"MonoB", "MonoA MuteB", "MonoA", "MonoA SwapB", "Mono",
/*Normal == Channel A = Left, Channel B = Right*/
};
static const char * const fm_texts[] = {
"Auto", "Single", "Double", "Quad",
};
static const char * const deemph_texts[] = {
"None", "44.1k", "48k", "32k",
};
static const char * const softr_zeroc_texts[] = {
"Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
};
static int deemph_values[] = {
0, 4, 8, 12,
};
static int softr_zeroc_values[] = {
0, 64, 128, 192,
};
static const struct soc_enum chan_mix_enum =
SOC_ENUM_SINGLE(CS4349_VMI, 0,
ARRAY_SIZE(chan_mix_texts),
chan_mix_texts);
static const struct soc_enum fm_mode_enum =
SOC_ENUM_SINGLE(CS4349_MODE, 0,
ARRAY_SIZE(fm_texts),
fm_texts);
static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK,
deemph_texts, deemph_values);
static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0,
SR_ZC_MASK, softr_zeroc_texts,
softr_zeroc_values);
static const struct snd_kcontrol_new cs4349_snd_controls[] = {
SOC_DOUBLE_R_TLV("Master Playback Volume",
CS4349_VOLA, CS4349_VOLB, 0, 0xFF, 1, dig_tlv),
SOC_ENUM("Functional Mode", fm_mode_enum),
SOC_ENUM("De-Emphasis Control", deemph_enum),
SOC_ENUM("Soft Ramp Zero Cross Control", softr_zeroc_enum),
SOC_ENUM("Channel Mixer", chan_mix_enum),
SOC_SINGLE("VolA = VolB Switch", CS4349_VMI, 7, 1, 0),
SOC_SINGLE("InvertA Switch", CS4349_VMI, 6, 1, 0),
SOC_SINGLE("InvertB Switch", CS4349_VMI, 5, 1, 0),
SOC_SINGLE("Auto-Mute Switch", CS4349_MUTE, 7, 1, 0),
SOC_SINGLE("MUTEC A = B Switch", CS4349_MUTE, 5, 1, 0),
SOC_SINGLE("Soft Ramp Up Switch", CS4349_RMPFLT, 5, 1, 0),
SOC_SINGLE("Soft Ramp Down Switch", CS4349_RMPFLT, 4, 1, 0),
SOC_SINGLE("Slow Roll Off Filter Switch", CS4349_RMPFLT, 2, 1, 0),
SOC_SINGLE("Freeze Switch", CS4349_MISC, 5, 1, 0),
SOC_SINGLE("Popguard Switch", CS4349_MISC, 4, 1, 0),
};
static const struct snd_soc_dapm_widget cs4349_dapm_widgets[] = {
SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("OutputA"),
SND_SOC_DAPM_OUTPUT("OutputB"),
};
static const struct snd_soc_dapm_route cs4349_routes[] = {
{"DAC Playback", NULL, "OutputA"},
{"DAC Playback", NULL, "OutputB"},
{"OutputA", NULL, "HiFi DAC"},
{"OutputB", NULL, "HiFi DAC"},
};
#define CS4349_PCM_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE | \
SNDRV_PCM_FMTBIT_S32_LE)
#define CS4349_PCM_RATES SNDRV_PCM_RATE_8000_192000
static const struct snd_soc_dai_ops cs4349_dai_ops = {
.hw_params = cs4349_pcm_hw_params,
.set_fmt = cs4349_set_dai_fmt,
.digital_mute = cs4349_digital_mute,
};
static struct snd_soc_dai_driver cs4349_dai = {
.name = "cs4349_hifi",
.playback = {
.stream_name = "DAC Playback",
.channels_min = 1,
.channels_max = 2,
.rates = CS4349_PCM_RATES,
.formats = CS4349_PCM_FORMATS,
},
.ops = &cs4349_dai_ops,
.symmetric_rates = 1,
};
static const struct snd_soc_codec_driver soc_codec_dev_cs4349 = {
.component_driver = {
.controls = cs4349_snd_controls,
.num_controls = ARRAY_SIZE(cs4349_snd_controls),
.dapm_widgets = cs4349_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(cs4349_dapm_widgets),
.dapm_routes = cs4349_routes,
.num_dapm_routes = ARRAY_SIZE(cs4349_routes),
},
};
static const struct regmap_config cs4349_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = CS4349_MISC,
.reg_defaults = cs4349_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(cs4349_reg_defaults),
.readable_reg = cs4349_readable_register,
.writeable_reg = cs4349_writeable_register,
.cache_type = REGCACHE_RBTREE,
};
static int cs4349_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct cs4349_private *cs4349;
int ret;
cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL);
if (!cs4349)
return -ENOMEM;
cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap);
if (IS_ERR(cs4349->regmap)) {
ret = PTR_ERR(cs4349->regmap);
dev_err(&client->dev, "regmap_init() failed: %d\n", ret);
return ret;
}
/* Reset the Device */
cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev,
"reset", GPIOD_OUT_LOW);
if (IS_ERR(cs4349->reset_gpio))
return PTR_ERR(cs4349->reset_gpio);
gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
i2c_set_clientdata(client, cs4349);
return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4349,
&cs4349_dai, 1);
}
static int cs4349_i2c_remove(struct i2c_client *client)
{
struct cs4349_private *cs4349 = i2c_get_clientdata(client);
snd_soc_unregister_codec(&client->dev);
/* Hold down reset */
gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
return 0;
}
#ifdef CONFIG_PM
static int cs4349_runtime_suspend(struct device *dev)
{
struct cs4349_private *cs4349 = dev_get_drvdata(dev);
int ret;
ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, PWR_DWN);
if (ret < 0)
return ret;
regcache_cache_only(cs4349->regmap, true);
/* Hold down reset */
gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
return 0;
}
static int cs4349_runtime_resume(struct device *dev)
{
struct cs4349_private *cs4349 = dev_get_drvdata(dev);
int ret;
ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 0);
if (ret < 0)
return ret;
gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
regcache_cache_only(cs4349->regmap, false);
regcache_sync(cs4349->regmap);
return 0;
}
#endif
static const struct dev_pm_ops cs4349_runtime_pm = {
SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume,
NULL)
};
static const struct of_device_id cs4349_of_match[] = {
{ .compatible = "cirrus,cs4349", },
{},
};
MODULE_DEVICE_TABLE(of, cs4349_of_match);
static const struct i2c_device_id cs4349_i2c_id[] = {
{"cs4349", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id);
static struct i2c_driver cs4349_i2c_driver = {
.driver = {
.name = "cs4349",
.of_match_table = cs4349_of_match,
},
.id_table = cs4349_i2c_id,
.probe = cs4349_i2c_probe,
.remove = cs4349_i2c_remove,
};
module_i2c_driver(cs4349_i2c_driver);
MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>");
MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver");
MODULE_LICENSE("GPL");
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