mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
a7dc662c6a
Work is guaranteed to be initialized on exit. Drop the unnecessary
if statement and always call flush_work.
This fixes a warning seen with clang:
sound/soc/codecs/pcm1789.c:265:13: warning: address of 'priv->work' will
always evaluate to 'true' [-Wpointer-bool-conversion]
if (&priv->work)
~~ ~~~~~~^~~~
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Mark Brown <broonie@kernel.org>
274 lines
6.7 KiB
C
274 lines
6.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Audio driver for PCM1789
|
|
// Copyright (C) 2018 Bootlin
|
|
// Mylène Josserand <mylene.josserand@bootlin.com>
|
|
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/module.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/tlv.h>
|
|
|
|
#include "pcm1789.h"
|
|
|
|
#define PCM1789_MUTE_CONTROL 0x10
|
|
#define PCM1789_FMT_CONTROL 0x11
|
|
#define PCM1789_SOFT_MUTE 0x14
|
|
#define PCM1789_DAC_VOL_LEFT 0x18
|
|
#define PCM1789_DAC_VOL_RIGHT 0x19
|
|
|
|
#define PCM1789_FMT_MASK 0x07
|
|
#define PCM1789_MUTE_MASK 0x03
|
|
#define PCM1789_MUTE_SRET 0x06
|
|
|
|
struct pcm1789_private {
|
|
struct regmap *regmap;
|
|
unsigned int format;
|
|
unsigned int rate;
|
|
struct gpio_desc *reset;
|
|
struct work_struct work;
|
|
struct device *dev;
|
|
};
|
|
|
|
static const struct reg_default pcm1789_reg_defaults[] = {
|
|
{ PCM1789_FMT_CONTROL, 0x00 },
|
|
{ PCM1789_SOFT_MUTE, 0x00 },
|
|
{ PCM1789_DAC_VOL_LEFT, 0xff },
|
|
{ PCM1789_DAC_VOL_RIGHT, 0xff },
|
|
};
|
|
|
|
static bool pcm1789_accessible_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
return reg >= PCM1789_MUTE_CONTROL && reg <= PCM1789_DAC_VOL_RIGHT;
|
|
}
|
|
|
|
static bool pcm1789_writeable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
return pcm1789_accessible_reg(dev, reg);
|
|
}
|
|
|
|
static int pcm1789_set_dai_fmt(struct snd_soc_dai *codec_dai,
|
|
unsigned int format)
|
|
{
|
|
struct snd_soc_component *component = codec_dai->component;
|
|
struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
|
|
|
|
priv->format = format;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pcm1789_digital_mute(struct snd_soc_dai *codec_dai, int mute)
|
|
{
|
|
struct snd_soc_component *component = codec_dai->component;
|
|
struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
|
|
|
|
return regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE,
|
|
PCM1789_MUTE_MASK,
|
|
mute ? 0 : PCM1789_MUTE_MASK);
|
|
}
|
|
|
|
static int pcm1789_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *codec_dai)
|
|
{
|
|
struct snd_soc_component *component = codec_dai->component;
|
|
struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
|
|
int val = 0, ret;
|
|
|
|
priv->rate = params_rate(params);
|
|
|
|
switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
|
|
case SND_SOC_DAIFMT_RIGHT_J:
|
|
switch (params_width(params)) {
|
|
case 24:
|
|
val = 2;
|
|
break;
|
|
case 16:
|
|
val = 3;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
case SND_SOC_DAIFMT_I2S:
|
|
switch (params_width(params)) {
|
|
case 16:
|
|
case 24:
|
|
case 32:
|
|
val = 0;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
case SND_SOC_DAIFMT_LEFT_J:
|
|
switch (params_width(params)) {
|
|
case 16:
|
|
case 24:
|
|
case 32:
|
|
val = 1;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
default:
|
|
dev_err(component->dev, "Invalid DAI format\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = regmap_update_bits(priv->regmap, PCM1789_FMT_CONTROL,
|
|
PCM1789_FMT_MASK, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pcm1789_work_queue(struct work_struct *work)
|
|
{
|
|
struct pcm1789_private *priv = container_of(work,
|
|
struct pcm1789_private,
|
|
work);
|
|
|
|
/* Perform a software reset to remove codec from desynchronized state */
|
|
if (regmap_update_bits(priv->regmap, PCM1789_MUTE_CONTROL,
|
|
0x3 << PCM1789_MUTE_SRET, 0) < 0)
|
|
dev_err(priv->dev, "Error while setting SRET");
|
|
}
|
|
|
|
static int pcm1789_trigger(struct snd_pcm_substream *substream, int cmd,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct snd_soc_component *component = dai->component;
|
|
struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
|
|
int ret = 0;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
schedule_work(&priv->work);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops pcm1789_dai_ops = {
|
|
.set_fmt = pcm1789_set_dai_fmt,
|
|
.hw_params = pcm1789_hw_params,
|
|
.digital_mute = pcm1789_digital_mute,
|
|
.trigger = pcm1789_trigger,
|
|
};
|
|
|
|
static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1);
|
|
|
|
static const struct snd_kcontrol_new pcm1789_controls[] = {
|
|
SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT,
|
|
PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
|
|
pcm1789_dac_tlv),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_widget pcm1789_dapm_widgets[] = {
|
|
SND_SOC_DAPM_OUTPUT("IOUTL+"),
|
|
SND_SOC_DAPM_OUTPUT("IOUTL-"),
|
|
SND_SOC_DAPM_OUTPUT("IOUTR+"),
|
|
SND_SOC_DAPM_OUTPUT("IOUTR-"),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_route pcm1789_dapm_routes[] = {
|
|
{ "IOUTL+", NULL, "Playback" },
|
|
{ "IOUTL-", NULL, "Playback" },
|
|
{ "IOUTR+", NULL, "Playback" },
|
|
{ "IOUTR-", NULL, "Playback" },
|
|
};
|
|
|
|
static struct snd_soc_dai_driver pcm1789_dai = {
|
|
.name = "pcm1789-hifi",
|
|
.playback = {
|
|
.stream_name = "Playback",
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
.rates = SNDRV_PCM_RATE_CONTINUOUS,
|
|
.rate_min = 10000,
|
|
.rate_max = 200000,
|
|
.formats = PCM1789_FORMATS,
|
|
},
|
|
.ops = &pcm1789_dai_ops,
|
|
};
|
|
|
|
const struct regmap_config pcm1789_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = PCM1789_DAC_VOL_RIGHT,
|
|
.reg_defaults = pcm1789_reg_defaults,
|
|
.num_reg_defaults = ARRAY_SIZE(pcm1789_reg_defaults),
|
|
.writeable_reg = pcm1789_writeable_reg,
|
|
.readable_reg = pcm1789_accessible_reg,
|
|
};
|
|
EXPORT_SYMBOL_GPL(pcm1789_regmap_config);
|
|
|
|
static const struct snd_soc_component_driver soc_component_dev_pcm1789 = {
|
|
.controls = pcm1789_controls,
|
|
.num_controls = ARRAY_SIZE(pcm1789_controls),
|
|
.dapm_widgets = pcm1789_dapm_widgets,
|
|
.num_dapm_widgets = ARRAY_SIZE(pcm1789_dapm_widgets),
|
|
.dapm_routes = pcm1789_dapm_routes,
|
|
.num_dapm_routes = ARRAY_SIZE(pcm1789_dapm_routes),
|
|
.idle_bias_on = 1,
|
|
.use_pmdown_time = 1,
|
|
.endianness = 1,
|
|
.non_legacy_dai_naming = 1,
|
|
};
|
|
|
|
int pcm1789_common_init(struct device *dev, struct regmap *regmap)
|
|
{
|
|
struct pcm1789_private *pcm1789;
|
|
|
|
pcm1789 = devm_kzalloc(dev, sizeof(struct pcm1789_private),
|
|
GFP_KERNEL);
|
|
if (!pcm1789)
|
|
return -ENOMEM;
|
|
|
|
pcm1789->regmap = regmap;
|
|
pcm1789->dev = dev;
|
|
dev_set_drvdata(dev, pcm1789);
|
|
|
|
pcm1789->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
|
|
if (IS_ERR(pcm1789->reset))
|
|
return PTR_ERR(pcm1789->reset);
|
|
|
|
gpiod_set_value_cansleep(pcm1789->reset, 0);
|
|
msleep(300);
|
|
|
|
INIT_WORK(&pcm1789->work, pcm1789_work_queue);
|
|
|
|
return devm_snd_soc_register_component(dev, &soc_component_dev_pcm1789,
|
|
&pcm1789_dai, 1);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcm1789_common_init);
|
|
|
|
int pcm1789_common_exit(struct device *dev)
|
|
{
|
|
struct pcm1789_private *priv = dev_get_drvdata(dev);
|
|
|
|
flush_work(&priv->work);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcm1789_common_exit);
|
|
|
|
MODULE_DESCRIPTION("ASoC PCM1789 driver");
|
|
MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>");
|
|
MODULE_LICENSE("GPL");
|