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linux/sound/soc/codecs/cs4341.c
Anders Roxell 3e8c45f57a
ASoC: cs4341: fix waring unused-function 
The driver cs4341 can be built with SPI and/or I2C, but it has to be one
of them at least. When I2C is set as a module we see the warning below:

sound/soc/codecs/cs4341.c:213:12: warning: ‘cs4341_probe’
defined but not used [-Wunused-function]
 static int cs4341_probe(struct device *dev)
            ^~~~~~~~~~~~

Rework so that we use IS_ENABLED instead of defined. Also change so
SND_SOC_CS4341 depends on SND_SOC_I2C_AND_SPI to we dont' get a link
error when SND_SOC_CS4341=y, I2C=m and REGMAP_I2C=m is set.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-14 22:13:51 +00:00

347 lines
8.6 KiB
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Cirrus Logic CS4341A ALSA SoC Codec Driver
* Author: Alexander Shiyan <shc_work@mail.ru>
*/
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#define CS4341_REG_MODE1 0x00
#define CS4341_REG_MODE2 0x01
#define CS4341_REG_MIX 0x02
#define CS4341_REG_VOLA 0x03
#define CS4341_REG_VOLB 0x04
#define CS4341_MODE2_DIF (7 << 4)
#define CS4341_MODE2_DIF_I2S_24 (0 << 4)
#define CS4341_MODE2_DIF_I2S_16 (1 << 4)
#define CS4341_MODE2_DIF_LJ_24 (2 << 4)
#define CS4341_MODE2_DIF_RJ_24 (3 << 4)
#define CS4341_MODE2_DIF_RJ_16 (5 << 4)
#define CS4341_VOLX_MUTE (1 << 7)
struct cs4341_priv {
unsigned int fmt;
struct regmap *regmap;
struct regmap_config regcfg;
};
static const struct reg_default cs4341_reg_defaults[] = {
{ CS4341_REG_MODE1, 0x00 },
{ CS4341_REG_MODE2, 0x82 },
{ CS4341_REG_MIX, 0x49 },
{ CS4341_REG_VOLA, 0x80 },
{ CS4341_REG_VOLB, 0x80 },
};
static int cs4341_set_fmt(struct snd_soc_dai *dai, unsigned int format)
{
struct snd_soc_component *component = dai->component;
struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component);
switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
switch (format & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
default:
return -EINVAL;
}
switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
case SND_SOC_DAIFMT_LEFT_J:
case SND_SOC_DAIFMT_RIGHT_J:
cs4341->fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
break;
default:
return -EINVAL;
}
return 0;
}
static int cs4341_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 cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component);
unsigned int mode = 0;
int b24 = 0;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S24_LE:
b24 = 1;
break;
case SNDRV_PCM_FORMAT_S16_LE:
break;
default:
dev_err(component->dev, "Unsupported PCM format 0x%08x.\n",
params_format(params));
return -EINVAL;
}
switch (cs4341->fmt) {
case SND_SOC_DAIFMT_I2S:
mode = b24 ? CS4341_MODE2_DIF_I2S_24 : CS4341_MODE2_DIF_I2S_16;
break;
case SND_SOC_DAIFMT_LEFT_J:
mode = CS4341_MODE2_DIF_LJ_24;
break;
case SND_SOC_DAIFMT_RIGHT_J:
mode = b24 ? CS4341_MODE2_DIF_RJ_24 : CS4341_MODE2_DIF_RJ_16;
break;
default:
dev_err(component->dev, "Unsupported DAI format 0x%08x.\n",
cs4341->fmt);
return -EINVAL;
}
return snd_soc_component_update_bits(component, CS4341_REG_MODE2,
CS4341_MODE2_DIF, mode);
}
static int cs4341_digital_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_component *component = dai->component;
int ret;
ret = snd_soc_component_update_bits(component, CS4341_REG_VOLA,
CS4341_VOLX_MUTE,
mute ? CS4341_VOLX_MUTE : 0);
if (ret < 0)
return ret;
return snd_soc_component_update_bits(component, CS4341_REG_VOLB,
CS4341_VOLX_MUTE,
mute ? CS4341_VOLX_MUTE : 0);
}
static DECLARE_TLV_DB_SCALE(out_tlv, -9000, 100, 0);
static const char * const deemph[] = {
"None", "44.1k", "48k", "32k",
};
static const struct soc_enum deemph_enum =
SOC_ENUM_SINGLE(CS4341_REG_MODE2, 2, 4, deemph);
static const char * const srzc[] = {
"Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
};
static const struct soc_enum srzc_enum =
SOC_ENUM_SINGLE(CS4341_REG_MIX, 5, 4, srzc);
static const struct snd_soc_dapm_widget cs4341_dapm_widgets[] = {
SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("OutA"),
SND_SOC_DAPM_OUTPUT("OutB"),
};
static const struct snd_soc_dapm_route cs4341_routes[] = {
{ "OutA", NULL, "HiFi DAC" },
{ "OutB", NULL, "HiFi DAC" },
{ "DAC Playback", NULL, "OutA" },
{ "DAC Playback", NULL, "OutB" },
};
static const struct snd_kcontrol_new cs4341_controls[] = {
SOC_DOUBLE_R_TLV("Master Playback Volume",
CS4341_REG_VOLA, CS4341_REG_VOLB, 0, 90, 1, out_tlv),
SOC_ENUM("De-Emphasis Control", deemph_enum),
SOC_ENUM("Soft Ramp Zero Cross Control", srzc_enum),
SOC_SINGLE("Auto-Mute Switch", CS4341_REG_MODE2, 7, 1, 0),
SOC_SINGLE("Popguard Transient Switch", CS4341_REG_MODE2, 1, 1, 0),
};
static const struct snd_soc_dai_ops cs4341_dai_ops = {
.set_fmt = cs4341_set_fmt,
.hw_params = cs4341_hw_params,
.digital_mute = cs4341_digital_mute,
};
static struct snd_soc_dai_driver cs4341_dai = {
.name = "cs4341a-hifi",
.playback = {
.stream_name = "DAC Playback",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE,
},
.ops = &cs4341_dai_ops,
.symmetric_rates = 1,
};
static const struct snd_soc_component_driver soc_component_cs4341 = {
.controls = cs4341_controls,
.num_controls = ARRAY_SIZE(cs4341_controls),
.dapm_widgets = cs4341_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(cs4341_dapm_widgets),
.dapm_routes = cs4341_routes,
.num_dapm_routes = ARRAY_SIZE(cs4341_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static const struct of_device_id __maybe_unused cs4341_dt_ids[] = {
{ .compatible = "cirrus,cs4341a", },
{ }
};
MODULE_DEVICE_TABLE(of, cs4341_dt_ids);
static int cs4341_probe(struct device *dev)
{
struct cs4341_priv *cs4341 = dev_get_drvdata(dev);
int i;
for (i = 0; i < ARRAY_SIZE(cs4341_reg_defaults); i++)
regmap_write(cs4341->regmap, cs4341_reg_defaults[i].reg,
cs4341_reg_defaults[i].def);
return devm_snd_soc_register_component(dev, &soc_component_cs4341,
&cs4341_dai, 1);
}
#if IS_ENABLED(CONFIG_I2C)
static int cs4341_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct cs4341_priv *cs4341;
cs4341 = devm_kzalloc(&i2c->dev, sizeof(*cs4341), GFP_KERNEL);
if (!cs4341)
return -ENOMEM;
i2c_set_clientdata(i2c, cs4341);
cs4341->regcfg.reg_bits = 8;
cs4341->regcfg.val_bits = 8;
cs4341->regcfg.max_register = CS4341_REG_VOLB;
cs4341->regcfg.cache_type = REGCACHE_FLAT;
cs4341->regcfg.reg_defaults = cs4341_reg_defaults;
cs4341->regcfg.num_reg_defaults = ARRAY_SIZE(cs4341_reg_defaults);
cs4341->regmap = devm_regmap_init_i2c(i2c, &cs4341->regcfg);
if (IS_ERR(cs4341->regmap))
return PTR_ERR(cs4341->regmap);
return cs4341_probe(&i2c->dev);
}
static const struct i2c_device_id cs4341_i2c_id[] = {
{ "cs4341", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, cs4341_i2c_id);
static struct i2c_driver cs4341_i2c_driver = {
.driver = {
.name = "cs4341-i2c",
.of_match_table = of_match_ptr(cs4341_dt_ids),
},
.probe = cs4341_i2c_probe,
.id_table = cs4341_i2c_id,
};
#endif
#if defined(CONFIG_SPI_MASTER)
static bool cs4341_reg_readable(struct device *dev, unsigned int reg)
{
return false;
}
static int cs4341_spi_probe(struct spi_device *spi)
{
struct cs4341_priv *cs4341;
int ret;
cs4341 = devm_kzalloc(&spi->dev, sizeof(*cs4341), GFP_KERNEL);
if (!cs4341)
return -ENOMEM;
if (!spi->bits_per_word)
spi->bits_per_word = 8;
if (!spi->max_speed_hz)
spi->max_speed_hz = 6000000;
ret = spi_setup(spi);
if (ret)
return ret;
spi_set_drvdata(spi, cs4341);
cs4341->regcfg.reg_bits = 16;
cs4341->regcfg.val_bits = 8;
cs4341->regcfg.write_flag_mask = 0x20;
cs4341->regcfg.max_register = CS4341_REG_VOLB;
cs4341->regcfg.cache_type = REGCACHE_FLAT;
cs4341->regcfg.readable_reg = cs4341_reg_readable;
cs4341->regcfg.reg_defaults = cs4341_reg_defaults;
cs4341->regcfg.num_reg_defaults = ARRAY_SIZE(cs4341_reg_defaults);
cs4341->regmap = devm_regmap_init_spi(spi, &cs4341->regcfg);
if (IS_ERR(cs4341->regmap))
return PTR_ERR(cs4341->regmap);
return cs4341_probe(&spi->dev);
}
static struct spi_driver cs4341_spi_driver = {
.driver = {
.name = "cs4341-spi",
.of_match_table = of_match_ptr(cs4341_dt_ids),
},
.probe = cs4341_spi_probe,
};
#endif
static int __init cs4341_init(void)
{
int ret = 0;
#if IS_ENABLED(CONFIG_I2C)
ret = i2c_add_driver(&cs4341_i2c_driver);
if (ret)
return ret;
#endif
#if defined(CONFIG_SPI_MASTER)
ret = spi_register_driver(&cs4341_spi_driver);
#endif
return ret;
}
module_init(cs4341_init);
static void __exit cs4341_exit(void)
{
#if IS_ENABLED(CONFIG_I2C)
i2c_del_driver(&cs4341_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&cs4341_spi_driver);
#endif
}
module_exit(cs4341_exit);
MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
MODULE_DESCRIPTION("Cirrus Logic CS4341 ALSA SoC Codec Driver");
MODULE_LICENSE("GPL");
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