// SPDX-License-Identifier: GPL-2.0-only
/*
* wm8741.c -- WM8741 ALSA SoC Audio driver
*
* Copyright 2010-1 Wolfson Microelectronics plc
*
* Author: Ian Lartey <[email protected]>
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "wm8741.h"
#define WM8741_NUM_SUPPLIES 2
static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
"AVDD",
"DVDD",
};
/* codec private data */
struct wm8741_priv {
struct wm8741_platform_data pdata;
struct regmap *regmap;
struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
unsigned int sysclk;
const struct snd_pcm_hw_constraint_list *sysclk_constraints;
};
static const struct reg_default wm8741_reg_defaults[] = {
{ 0, 0x0000 }, /* R0 - DACLLSB Attenuation */
{ 1, 0x0000 }, /* R1 - DACLMSB Attenuation */
{ 2, 0x0000 }, /* R2 - DACRLSB Attenuation */
{ 3, 0x0000 }, /* R3 - DACRMSB Attenuation */
{ 4, 0x0000 }, /* R4 - Volume Control */
{ 5, 0x000A }, /* R5 - Format Control */
{ 6, 0x0000 }, /* R6 - Filter Control */
{ 7, 0x0000 }, /* R7 - Mode Control 1 */
{ 8, 0x0002 }, /* R8 - Mode Control 2 */
{ 32, 0x0002 }, /* R32 - ADDITONAL_CONTROL_1 */
};
static int wm8741_reset(struct snd_soc_component *component)
{
return snd_soc_component_write(component, WM8741_RESET, 0);
}
static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = {
SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
};
static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = {
SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
1, 255, 1, dac_tlv_fine),
SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
0, 511, 1, dac_tlv),
};
static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = {
SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
1, 255, 1, dac_tlv_fine),
SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION,
0, 511, 1, dac_tlv),
};
static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("VOUTLP"),
SND_SOC_DAPM_OUTPUT("VOUTLN"),
SND_SOC_DAPM_OUTPUT("VOUTRP"),
SND_SOC_DAPM_OUTPUT("VOUTRN"),
};
static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
{ "VOUTLP", NULL, "DACL" },
{ "VOUTLN", NULL, "DACL" },
{ "VOUTRP", NULL, "DACR" },
{ "VOUTRN", NULL, "DACR" },
};
static const unsigned int rates_11289[] = {
44100, 88200,
};
static const struct snd_pcm_hw_constraint_list constraints_11289 = {
.count = ARRAY_SIZE(rates_11289),
.list = rates_11289,
};
static const unsigned int rates_12288[] = {
32000, 48000, 96000,
};
static const struct snd_pcm_hw_constraint_list constraints_12288 = {
.count = ARRAY_SIZE(rates_12288),
.list = rates_12288,
};
static const unsigned int rates_16384[] = {
32000,
};
static const struct snd_pcm_hw_constraint_list constraints_16384 = {
.count = ARRAY_SIZE(rates_16384),
.list = rates_16384,
};
static const unsigned int rates_16934[] = {
44100, 88200,
};
static const struct snd_pcm_hw_constraint_list constraints_16934 = {
.count = ARRAY_SIZE(rates_16934),
.list = rates_16934,
};
static const unsigned int rates_18432[] = {
48000, 96000,
};
static const struct snd_pcm_hw_constraint_list constraints_18432 = {
.count = ARRAY_SIZE(rates_18432),
.list = rates_18432,
};
static const unsigned int rates_22579[] = {
44100, 88200, 176400
};
static const struct snd_pcm_hw_constraint_list constraints_22579 = {
.count = ARRAY_SIZE(rates_22579),
.list = rates_22579,
};
static const unsigned int rates_24576[] = {
32000, 48000, 96000, 192000
};
static const struct snd_pcm_hw_constraint_list constraints_24576 = {
.count = ARRAY_SIZE(rates_24576),
.list = rates_24576,
};
static const unsigned int rates_36864[] = {
48000, 96000, 192000
};
static const struct snd_pcm_hw_constraint_list constraints_36864 = {
.count = ARRAY_SIZE(rates_36864),
.list = rates_36864,
};
static int wm8741_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
if (wm8741->sysclk)
snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
wm8741->sysclk_constraints);
return 0;
}
static int wm8741_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 wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
unsigned int iface, mode;
int i;
/* The set of sample rates that can be supported depends on the
* MCLK supplied to the CODEC - enforce this.
*/
if (!wm8741->sysclk) {
dev_err(component->dev,
"No MCLK configured, call set_sysclk() on init or in hw_params\n");
return -EINVAL;
}
/* Find a supported LRCLK rate */
for (i = 0; i < wm8741->sysclk_constraints->count; i++) {
if (wm8741->sysclk_constraints->list[i] == params_rate(params))
break;
}
if (i == wm8741->sysclk_constraints->count) {
dev_err(component->dev, "LRCLK %d unsupported with MCLK %d\n",
params_rate(params), wm8741->sysclk);
return -EINVAL;
}
/* bit size */
switch (params_width(params)) {
case 16:
iface = 0x0;
break;
case 20:
iface = 0x1;
break;
case 24:
iface = 0x2;
break;
case 32:
iface = 0x3;
break;
default:
dev_dbg(component->dev, "wm8741_hw_params: Unsupported bit size param = %d",
params_width(params));
return -EINVAL;
}
/* oversampling rate */
if (params_rate(params) > 96000)
mode = 0x40;
else if (params_rate(params) > 48000)
mode = 0x20;
else
mode = 0x00;
dev_dbg(component->dev, "wm8741_hw_params: bit size param = %d, rate param = %d",
params_width(params), params_rate(params));
snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK,
iface);
snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_1, WM8741_OSR_MASK,
mode);
return 0;
}
static int wm8741_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 wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
dev_dbg(component->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
switch (freq) {
case 0:
wm8741->sysclk_constraints = NULL;
break;
case 11289600:
wm8741->sysclk_constraints = &constraints_11289;
break;
case 12288000:
wm8741->sysclk_constraints = &constraints_12288;
break;
case 16384000:
wm8741->sysclk_constraints = &constraints_16384;
break;
case 16934400:
wm8741->sysclk_constraints = &constraints_16934;
break;
case 18432000:
wm8741->sysclk_constraints = &constraints_18432;
break;
case 22579200:
case 33868800:
wm8741->sysclk_constraints = &constraints_22579;
break;
case 24576000:
wm8741->sysclk_constraints = &constraints_24576;
break;
case 36864000:
wm8741->sysclk_constraints = &constraints_36864;
break;
default:
return -EINVAL;
}
wm8741->sysclk = freq;
return 0;
}
static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
unsigned int iface;
/* check master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
iface = 0x08;
break;
case SND_SOC_DAIFMT_RIGHT_J:
iface = 0x00;
break;
case SND_SOC_DAIFMT_LEFT_J:
iface = 0x04;
break;
case SND_SOC_DAIFMT_DSP_A:
iface = 0x0C;
break;
case SND_SOC_DAIFMT_DSP_B:
iface = 0x1C;
break;
default:
return -EINVAL;
}
/* clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= 0x10;
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= 0x20;
break;
case SND_SOC_DAIFMT_IB_IF:
iface |= 0x30;
break;
default:
return -EINVAL;
}
dev_dbg(component->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
fmt & SND_SOC_DAIFMT_FORMAT_MASK,
((fmt & SND_SOC_DAIFMT_INV_MASK)));
snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL,
WM8741_BCP_MASK | WM8741_LRP_MASK | WM8741_FMT_MASK,
iface);
return 0;
}
static int wm8741_mute(struct snd_soc_dai *codec_dai, int mute, int direction)
{
struct snd_soc_component *component = codec_dai->component;
snd_soc_component_update_bits(component, WM8741_VOLUME_CONTROL,
WM8741_SOFT_MASK, !!mute << WM8741_SOFT_SHIFT);
return 0;
}
#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
SNDRV_PCM_RATE_192000)
#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
static const struct snd_soc_dai_ops wm8741_dai_ops = {
.startup = wm8741_startup,
.hw_params = wm8741_hw_params,
.set_sysclk = wm8741_set_dai_sysclk,
.set_fmt = wm8741_set_dai_fmt,
.mute_stream = wm8741_mute,
.no_capture_mute = 1,
};
static struct snd_soc_dai_driver wm8741_dai = {
.name = "wm8741",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = WM8741_RATES,
.formats = WM8741_FORMATS,
},
.ops = &wm8741_dai_ops,
};
#ifdef CONFIG_PM
static int wm8741_resume(struct snd_soc_component *component)
{
snd_soc_component_cache_sync(component);
return 0;
}
#else
#define wm8741_resume NULL
#endif
static int wm8741_configure(struct snd_soc_component *component)
{
struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
/* Configure differential mode */
switch (wm8741->pdata.diff_mode) {
case WM8741_DIFF_MODE_STEREO:
case WM8741_DIFF_MODE_STEREO_REVERSED:
case WM8741_DIFF_MODE_MONO_LEFT:
case WM8741_DIFF_MODE_MONO_RIGHT:
snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_2,
WM8741_DIFF_MASK,
wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
break;
default:
return -EINVAL;
}
/* Change some default settings - latch VU */
snd_soc_component_update_bits(component, WM8741_DACLLSB_ATTENUATION,
WM8741_UPDATELL, WM8741_UPDATELL);
snd_soc_component_update_bits(component, WM8741_DACLMSB_ATTENUATION,
WM8741_UPDATELM, WM8741_UPDATELM);
snd_soc_component_update_bits(component, WM8741_DACRLSB_ATTENUATION,
WM8741_UPDATERL, WM8741_UPDATERL);
snd_soc_component_update_bits(component, WM8741_DACRMSB_ATTENUATION,
WM8741_UPDATERM, WM8741_UPDATERM);
return 0;
}
static int wm8741_add_controls(struct snd_soc_component *component)
{
struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
switch (wm8741->pdata.diff_mode) {
case WM8741_DIFF_MODE_STEREO:
case WM8741_DIFF_MODE_STEREO_REVERSED:
snd_soc_add_component_controls(component,
wm8741_snd_controls_stereo,
ARRAY_SIZE(wm8741_snd_controls_stereo));
break;
case WM8741_DIFF_MODE_MONO_LEFT:
snd_soc_add_component_controls(component,
wm8741_snd_controls_mono_left,
ARRAY_SIZE(wm8741_snd_controls_mono_left));
break;
case WM8741_DIFF_MODE_MONO_RIGHT:
snd_soc_add_component_controls(component,
wm8741_snd_controls_mono_right,
ARRAY_SIZE(wm8741_snd_controls_mono_right));
break;
default:
return -EINVAL;
}
return 0;
}
static int wm8741_probe(struct snd_soc_component *component)
{
struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
int ret = 0;
ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
wm8741->supplies);
if (ret != 0) {
dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
goto err_get;
}
ret = wm8741_reset(component);
if (ret < 0) {
dev_err(component->dev, "Failed to issue reset\n");
goto err_enable;
}
ret = wm8741_configure(component);
if (ret < 0) {
dev_err(component->dev, "Failed to change default settings\n");
goto err_enable;
}
ret = wm8741_add_controls(component);
if (ret < 0) {
dev_err(component->dev, "Failed to add controls\n");
goto err_enable;
}
dev_dbg(component->dev, "Successful registration\n");
return ret;
err_enable:
regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
err_get:
return ret;
}
static void wm8741_remove(struct snd_soc_component *component)
{
struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
}
static const struct snd_soc_component_driver soc_component_dev_wm8741 = {
.probe = wm8741_probe,
.remove = wm8741_remove,
.resume = wm8741_resume,
.dapm_widgets = wm8741_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
.dapm_routes = wm8741_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static const struct of_device_id wm8741_of_match[] = {
{ .compatible = "wlf,wm8741", },
{ }
};
MODULE_DEVICE_TABLE(of, wm8741_of_match);
static const struct regmap_config wm8741_regmap = {
.reg_bits = 7,
.val_bits = 9,
.max_register = WM8741_MAX_REGISTER,
.reg_defaults = wm8741_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
.cache_type = REGCACHE_MAPLE,
};
static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
{
const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
u32 diff_mode;
if (dev->of_node) {
if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
>= 0)
wm8741->pdata.diff_mode = diff_mode;
} else {
if (pdata != NULL)
memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
}
return 0;
}
#if IS_ENABLED(CONFIG_I2C)
static int wm8741_i2c_probe(struct i2c_client *i2c)
{
struct wm8741_priv *wm8741;
int ret, i;
wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
GFP_KERNEL);
if (wm8741 == NULL)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
wm8741->supplies[i].supply = wm8741_supply_names[i];
ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
wm8741->supplies);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
return ret;
}
wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
if (IS_ERR(wm8741->regmap)) {
ret = PTR_ERR(wm8741->regmap);
dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
return ret;
}
ret = wm8741_set_pdata(&i2c->dev, wm8741);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
return ret;
}
i2c_set_clientdata(i2c, wm8741);
ret = devm_snd_soc_register_component(&i2c->dev,
&soc_component_dev_wm8741, &wm8741_dai, 1);
return ret;
}
static const struct i2c_device_id wm8741_i2c_id[] = {
{ "wm8741" },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
static struct i2c_driver wm8741_i2c_driver = {
.driver = {
.name = "wm8741",
.of_match_table = wm8741_of_match,
},
.probe = wm8741_i2c_probe,
.id_table = wm8741_i2c_id,
};
#endif
#if defined(CONFIG_SPI_MASTER)
static int wm8741_spi_probe(struct spi_device *spi)
{
struct wm8741_priv *wm8741;
int ret, i;
wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
GFP_KERNEL);
if (wm8741 == NULL)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
wm8741->supplies[i].supply = wm8741_supply_names[i];
ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
wm8741->supplies);
if (ret != 0) {
dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
return ret;
}
wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
if (IS_ERR(wm8741->regmap)) {
ret = PTR_ERR(wm8741->regmap);
dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
return ret;
}
ret = wm8741_set_pdata(&spi->dev, wm8741);
if (ret != 0) {
dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
return ret;
}
spi_set_drvdata(spi, wm8741);
ret = devm_snd_soc_register_component(&spi->dev,
&soc_component_dev_wm8741, &wm8741_dai, 1);
return ret;
}
static struct spi_driver wm8741_spi_driver = {
.driver = {
.name = "wm8741",
.of_match_table = wm8741_of_match,
},
.probe = wm8741_spi_probe,
};
#endif /* CONFIG_SPI_MASTER */
static int __init wm8741_modinit(void)
{
int ret = 0;
#if IS_ENABLED(CONFIG_I2C)
ret = i2c_add_driver(&wm8741_i2c_driver);
if (ret != 0)
pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
#endif
#if defined(CONFIG_SPI_MASTER)
ret = spi_register_driver(&wm8741_spi_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
ret);
}
#endif
return ret;
}
module_init(wm8741_modinit);
static void __exit wm8741_exit(void)
{
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8741_spi_driver);
#endif
#if IS_ENABLED(CONFIG_I2C)
i2c_del_driver(&wm8741_i2c_driver);
#endif
}
module_exit(wm8741_exit);
MODULE_DESCRIPTION("ASoC WM8741 driver");
MODULE_AUTHOR("Ian Lartey <[email protected]>");
MODULE_LICENSE("GPL");
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