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linux/sound/soc/codecs/tas2764.c
Ye Bin b186e7c17d
ASoC: tas2764: constify static struct snd_soc_dai_ops 
The snd_soc_dai_ops structures is only stored in the ops field of a
snd_soc_dai_driver structure, so make the snd_soc_dai_ops structure
const to allow the compiler to put it in read-only memory.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ye Bin <yebin10@huawei.com>
Link: https://lore.kernel.org/r/20210408062643.802908-1-yebin10@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2021-04-08 15:21:50 +01:00

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// SPDX-License-Identifier: GPL-2.0
//
// Driver for the Texas Instruments TAS2764 CODEC
// Copyright (C) 2020 Texas Instruments Inc.
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <linux/regmap.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "tas2764.h"
struct tas2764_priv {
struct snd_soc_component *component;
struct gpio_desc *reset_gpio;
struct gpio_desc *sdz_gpio;
struct regmap *regmap;
struct device *dev;
int v_sense_slot;
int i_sense_slot;
};
static void tas2764_reset(struct tas2764_priv *tas2764)
{
if (tas2764->reset_gpio) {
gpiod_set_value_cansleep(tas2764->reset_gpio, 0);
msleep(20);
gpiod_set_value_cansleep(tas2764->reset_gpio, 1);
}
snd_soc_component_write(tas2764->component, TAS2764_SW_RST,
TAS2764_RST);
}
static int tas2764_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
switch (level) {
case SND_SOC_BIAS_ON:
snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
TAS2764_PWR_CTRL_MASK,
TAS2764_PWR_CTRL_ACTIVE);
break;
case SND_SOC_BIAS_STANDBY:
case SND_SOC_BIAS_PREPARE:
snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
TAS2764_PWR_CTRL_MASK,
TAS2764_PWR_CTRL_MUTE);
break;
case SND_SOC_BIAS_OFF:
snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
TAS2764_PWR_CTRL_MASK,
TAS2764_PWR_CTRL_SHUTDOWN);
break;
default:
dev_err(tas2764->dev,
"wrong power level setting %d\n", level);
return -EINVAL;
}
return 0;
}
#ifdef CONFIG_PM
static int tas2764_codec_suspend(struct snd_soc_component *component)
{
struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
int ret;
ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
TAS2764_PWR_CTRL_MASK,
TAS2764_PWR_CTRL_SHUTDOWN);
if (ret < 0)
return ret;
if (tas2764->sdz_gpio)
gpiod_set_value_cansleep(tas2764->sdz_gpio, 0);
regcache_cache_only(tas2764->regmap, true);
regcache_mark_dirty(tas2764->regmap);
return 0;
}
static int tas2764_codec_resume(struct snd_soc_component *component)
{
struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
int ret;
if (tas2764->sdz_gpio)
gpiod_set_value_cansleep(tas2764->sdz_gpio, 1);
ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
TAS2764_PWR_CTRL_MASK,
TAS2764_PWR_CTRL_ACTIVE);
if (ret < 0)
return ret;
regcache_cache_only(tas2764->regmap, false);
return regcache_sync(tas2764->regmap);
}
#else
#define tas2764_codec_suspend NULL
#define tas2764_codec_resume NULL
#endif
static const char * const tas2764_ASI1_src[] = {
"I2C offset", "Left", "Right", "LeftRightDiv2",
};
static SOC_ENUM_SINGLE_DECL(
tas2764_ASI1_src_enum, TAS2764_TDM_CFG2, 4, tas2764_ASI1_src);
static const struct snd_kcontrol_new tas2764_asi1_mux =
SOC_DAPM_ENUM("ASI1 Source", tas2764_ASI1_src_enum);
static int tas2764_dac_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
int ret;
switch (event) {
case SND_SOC_DAPM_POST_PMU:
ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
TAS2764_PWR_CTRL_MASK,
TAS2764_PWR_CTRL_MUTE);
break;
case SND_SOC_DAPM_PRE_PMD:
ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
TAS2764_PWR_CTRL_MASK,
TAS2764_PWR_CTRL_SHUTDOWN);
break;
default:
dev_err(tas2764->dev, "Unsupported event\n");
return -EINVAL;
}
if (ret < 0)
return ret;
return 0;
}
static const struct snd_kcontrol_new isense_switch =
SOC_DAPM_SINGLE("Switch", TAS2764_PWR_CTRL, TAS2764_ISENSE_POWER_EN, 1, 1);
static const struct snd_kcontrol_new vsense_switch =
SOC_DAPM_SINGLE("Switch", TAS2764_PWR_CTRL, TAS2764_VSENSE_POWER_EN, 1, 1);
static const struct snd_soc_dapm_widget tas2764_dapm_widgets[] = {
SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2764_asi1_mux),
SND_SOC_DAPM_SWITCH("ISENSE", TAS2764_PWR_CTRL, TAS2764_ISENSE_POWER_EN,
1, &isense_switch),
SND_SOC_DAPM_SWITCH("VSENSE", TAS2764_PWR_CTRL, TAS2764_VSENSE_POWER_EN,
1, &vsense_switch),
SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2764_dac_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
SND_SOC_DAPM_OUTPUT("OUT"),
SND_SOC_DAPM_SIGGEN("VMON"),
SND_SOC_DAPM_SIGGEN("IMON")
};
static const struct snd_soc_dapm_route tas2764_audio_map[] = {
{"ASI1 Sel", "I2C offset", "ASI1"},
{"ASI1 Sel", "Left", "ASI1"},
{"ASI1 Sel", "Right", "ASI1"},
{"ASI1 Sel", "LeftRightDiv2", "ASI1"},
{"DAC", NULL, "ASI1 Sel"},
{"OUT", NULL, "DAC"},
{"ISENSE", "Switch", "IMON"},
{"VSENSE", "Switch", "VMON"},
};
static int tas2764_mute(struct snd_soc_dai *dai, int mute, int direction)
{
struct snd_soc_component *component = dai->component;
int ret;
ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
TAS2764_PWR_CTRL_MASK,
mute ? TAS2764_PWR_CTRL_MUTE : 0);
if (ret < 0)
return ret;
return 0;
}
static int tas2764_set_bitwidth(struct tas2764_priv *tas2764, int bitwidth)
{
struct snd_soc_component *component = tas2764->component;
int sense_en;
int val;
int ret;
switch (bitwidth) {
case SNDRV_PCM_FORMAT_S16_LE:
ret = snd_soc_component_update_bits(component,
TAS2764_TDM_CFG2,
TAS2764_TDM_CFG2_RXW_MASK,
TAS2764_TDM_CFG2_RXW_16BITS);
break;
case SNDRV_PCM_FORMAT_S24_LE:
ret = snd_soc_component_update_bits(component,
TAS2764_TDM_CFG2,
TAS2764_TDM_CFG2_RXW_MASK,
TAS2764_TDM_CFG2_RXW_24BITS);
break;
case SNDRV_PCM_FORMAT_S32_LE:
ret = snd_soc_component_update_bits(component,
TAS2764_TDM_CFG2,
TAS2764_TDM_CFG2_RXW_MASK,
TAS2764_TDM_CFG2_RXW_32BITS);
break;
default:
return -EINVAL;
}
if (ret < 0)
return ret;
val = snd_soc_component_read(tas2764->component, TAS2764_PWR_CTRL);
if (val < 0)
return val;
if (val & (1 << TAS2764_VSENSE_POWER_EN))
sense_en = 0;
else
sense_en = TAS2764_TDM_CFG5_VSNS_ENABLE;
ret = snd_soc_component_update_bits(tas2764->component, TAS2764_TDM_CFG5,
TAS2764_TDM_CFG5_VSNS_ENABLE,
sense_en);
if (ret < 0)
return ret;
if (val & (1 << TAS2764_ISENSE_POWER_EN))
sense_en = 0;
else
sense_en = TAS2764_TDM_CFG6_ISNS_ENABLE;
ret = snd_soc_component_update_bits(tas2764->component, TAS2764_TDM_CFG6,
TAS2764_TDM_CFG6_ISNS_ENABLE,
sense_en);
if (ret < 0)
return ret;
return 0;
}
static int tas2764_set_samplerate(struct tas2764_priv *tas2764, int samplerate)
{
struct snd_soc_component *component = tas2764->component;
int ramp_rate_val;
int ret;
switch (samplerate) {
case 48000:
ramp_rate_val = TAS2764_TDM_CFG0_SMP_48KHZ |
TAS2764_TDM_CFG0_44_1_48KHZ;
break;
case 44100:
ramp_rate_val = TAS2764_TDM_CFG0_SMP_44_1KHZ |
TAS2764_TDM_CFG0_44_1_48KHZ;
break;
case 96000:
ramp_rate_val = TAS2764_TDM_CFG0_SMP_48KHZ |
TAS2764_TDM_CFG0_88_2_96KHZ;
break;
case 88200:
ramp_rate_val = TAS2764_TDM_CFG0_SMP_44_1KHZ |
TAS2764_TDM_CFG0_88_2_96KHZ;
break;
default:
return -EINVAL;
}
ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG0,
TAS2764_TDM_CFG0_SMP_MASK |
TAS2764_TDM_CFG0_MASK,
ramp_rate_val);
if (ret < 0)
return ret;
return 0;
}
static int tas2764_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 tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
int ret;
ret = tas2764_set_bitwidth(tas2764, params_format(params));
if (ret < 0)
return ret;
return tas2764_set_samplerate(tas2764, params_rate(params));
}
static int tas2764_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_component *component = dai->component;
struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
u8 tdm_rx_start_slot = 0, asi_cfg_1 = 0;
int iface;
int ret;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
asi_cfg_1 = TAS2764_TDM_CFG1_RX_RISING;
break;
case SND_SOC_DAIFMT_IB_NF:
asi_cfg_1 = TAS2764_TDM_CFG1_RX_FALLING;
break;
default:
dev_err(tas2764->dev, "ASI format Inverse is not found\n");
return -EINVAL;
}
ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG1,
TAS2764_TDM_CFG1_RX_MASK,
asi_cfg_1);
if (ret < 0)
return ret;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
case SND_SOC_DAIFMT_DSP_A:
iface = TAS2764_TDM_CFG2_SCFG_I2S;
tdm_rx_start_slot = 1;
break;
case SND_SOC_DAIFMT_DSP_B:
case SND_SOC_DAIFMT_LEFT_J:
iface = TAS2764_TDM_CFG2_SCFG_LEFT_J;
tdm_rx_start_slot = 0;
break;
default:
dev_err(tas2764->dev,
"DAI Format is not found, fmt=0x%x\n", fmt);
return -EINVAL;
}
ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG1,
TAS2764_TDM_CFG1_MASK,
(tdm_rx_start_slot << TAS2764_TDM_CFG1_51_SHIFT));
if (ret < 0)
return ret;
ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG2,
TAS2764_TDM_CFG2_SCFG_MASK, iface);
if (ret < 0)
return ret;
return 0;
}
static int tas2764_set_dai_tdm_slot(struct snd_soc_dai *dai,
unsigned int tx_mask,
unsigned int rx_mask,
int slots, int slot_width)
{
struct snd_soc_component *component = dai->component;
struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
int left_slot, right_slot;
int slots_cfg;
int slot_size;
int ret;
if (tx_mask == 0 || rx_mask != 0)
return -EINVAL;
if (slots == 1) {
if (tx_mask != 1)
return -EINVAL;
left_slot = 0;
right_slot = 0;
} else {
left_slot = __ffs(tx_mask);
tx_mask &= ~(1 << left_slot);
if (tx_mask == 0) {
right_slot = left_slot;
} else {
right_slot = __ffs(tx_mask);
tx_mask &= ~(1 << right_slot);
}
}
if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
return -EINVAL;
slots_cfg = (right_slot << TAS2764_TDM_CFG3_RXS_SHIFT) | left_slot;
ret = snd_soc_component_write(component, TAS2764_TDM_CFG3, slots_cfg);
if (ret)
return ret;
switch (slot_width) {
case 16:
slot_size = TAS2764_TDM_CFG2_RXS_16BITS;
break;
case 24:
slot_size = TAS2764_TDM_CFG2_RXS_24BITS;
break;
case 32:
slot_size = TAS2764_TDM_CFG2_RXS_32BITS;
break;
default:
return -EINVAL;
}
ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG2,
TAS2764_TDM_CFG2_RXS_MASK,
slot_size);
if (ret < 0)
return ret;
ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG5,
TAS2764_TDM_CFG5_50_MASK,
tas2764->v_sense_slot);
if (ret < 0)
return ret;
ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG6,
TAS2764_TDM_CFG6_50_MASK,
tas2764->i_sense_slot);
if (ret < 0)
return ret;
return 0;
}
static const struct snd_soc_dai_ops tas2764_dai_ops = {
.mute_stream = tas2764_mute,
.hw_params = tas2764_hw_params,
.set_fmt = tas2764_set_fmt,
.set_tdm_slot = tas2764_set_dai_tdm_slot,
.no_capture_mute = 1,
};
#define TAS2764_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
#define TAS2764_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_88200)
static struct snd_soc_dai_driver tas2764_dai_driver[] = {
{
.name = "tas2764 ASI1",
.id = 0,
.playback = {
.stream_name = "ASI1 Playback",
.channels_min = 2,
.channels_max = 2,
.rates = TAS2764_RATES,
.formats = TAS2764_FORMATS,
},
.capture = {
.stream_name = "ASI1 Capture",
.channels_min = 0,
.channels_max = 2,
.rates = TAS2764_RATES,
.formats = TAS2764_FORMATS,
},
.ops = &tas2764_dai_ops,
.symmetric_rate = 1,
},
};
static int tas2764_codec_probe(struct snd_soc_component *component)
{
struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
int ret;
tas2764->component = component;
if (tas2764->sdz_gpio)
gpiod_set_value_cansleep(tas2764->sdz_gpio, 1);
tas2764_reset(tas2764);
ret = snd_soc_component_update_bits(tas2764->component, TAS2764_TDM_CFG5,
TAS2764_TDM_CFG5_VSNS_ENABLE, 0);
if (ret < 0)
return ret;
ret = snd_soc_component_update_bits(tas2764->component, TAS2764_TDM_CFG6,
TAS2764_TDM_CFG6_ISNS_ENABLE, 0);
if (ret < 0)
return ret;
ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
TAS2764_PWR_CTRL_MASK,
TAS2764_PWR_CTRL_MUTE);
if (ret < 0)
return ret;
return 0;
}
static DECLARE_TLV_DB_SCALE(tas2764_digital_tlv, 1100, 50, 0);
static DECLARE_TLV_DB_SCALE(tas2764_playback_volume, -10000, 50, 0);
static const struct snd_kcontrol_new tas2764_snd_controls[] = {
SOC_SINGLE_TLV("Speaker Volume", TAS2764_DVC, 0,
TAS2764_DVC_MAX, 1, tas2764_playback_volume),
SOC_SINGLE_TLV("Amp Gain Volume", TAS2764_CHNL_0, 0, 0x14, 0,
tas2764_digital_tlv),
};
static const struct snd_soc_component_driver soc_component_driver_tas2764 = {
.probe = tas2764_codec_probe,
.suspend = tas2764_codec_suspend,
.resume = tas2764_codec_resume,
.set_bias_level = tas2764_set_bias_level,
.controls = tas2764_snd_controls,
.num_controls = ARRAY_SIZE(tas2764_snd_controls),
.dapm_widgets = tas2764_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(tas2764_dapm_widgets),
.dapm_routes = tas2764_audio_map,
.num_dapm_routes = ARRAY_SIZE(tas2764_audio_map),
.idle_bias_on = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static const struct reg_default tas2764_reg_defaults[] = {
{ TAS2764_PAGE, 0x00 },
{ TAS2764_SW_RST, 0x00 },
{ TAS2764_PWR_CTRL, 0x1a },
{ TAS2764_DVC, 0x00 },
{ TAS2764_CHNL_0, 0x00 },
{ TAS2764_TDM_CFG0, 0x09 },
{ TAS2764_TDM_CFG1, 0x02 },
{ TAS2764_TDM_CFG2, 0x0a },
{ TAS2764_TDM_CFG3, 0x10 },
{ TAS2764_TDM_CFG5, 0x42 },
};
static const struct regmap_range_cfg tas2764_regmap_ranges[] = {
{
.range_min = 0,
.range_max = 1 * 128,
.selector_reg = TAS2764_PAGE,
.selector_mask = 0xff,
.selector_shift = 0,
.window_start = 0,
.window_len = 128,
},
};
static const struct regmap_config tas2764_i2c_regmap = {
.reg_bits = 8,
.val_bits = 8,
.reg_defaults = tas2764_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(tas2764_reg_defaults),
.cache_type = REGCACHE_RBTREE,
.ranges = tas2764_regmap_ranges,
.num_ranges = ARRAY_SIZE(tas2764_regmap_ranges),
.max_register = 1 * 128,
};
static int tas2764_parse_dt(struct device *dev, struct tas2764_priv *tas2764)
{
int ret = 0;
tas2764->reset_gpio = devm_gpiod_get_optional(tas2764->dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(tas2764->reset_gpio)) {
if (PTR_ERR(tas2764->reset_gpio) == -EPROBE_DEFER) {
tas2764->reset_gpio = NULL;
return -EPROBE_DEFER;
}
}
tas2764->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
if (IS_ERR(tas2764->sdz_gpio)) {
if (PTR_ERR(tas2764->sdz_gpio) == -EPROBE_DEFER)
return -EPROBE_DEFER;
tas2764->sdz_gpio = NULL;
}
ret = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
&tas2764->i_sense_slot);
if (ret)
tas2764->i_sense_slot = 0;
ret = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
&tas2764->v_sense_slot);
if (ret)
tas2764->v_sense_slot = 2;
return 0;
}
static int tas2764_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tas2764_priv *tas2764;
int result;
tas2764 = devm_kzalloc(&client->dev, sizeof(struct tas2764_priv),
GFP_KERNEL);
if (!tas2764)
return -ENOMEM;
tas2764->dev = &client->dev;
i2c_set_clientdata(client, tas2764);
dev_set_drvdata(&client->dev, tas2764);
tas2764->regmap = devm_regmap_init_i2c(client, &tas2764_i2c_regmap);
if (IS_ERR(tas2764->regmap)) {
result = PTR_ERR(tas2764->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
result);
return result;
}
if (client->dev.of_node) {
result = tas2764_parse_dt(&client->dev, tas2764);
if (result) {
dev_err(tas2764->dev, "%s: Failed to parse devicetree\n",
__func__);
return result;
}
}
return devm_snd_soc_register_component(tas2764->dev,
&soc_component_driver_tas2764,
tas2764_dai_driver,
ARRAY_SIZE(tas2764_dai_driver));
}
static const struct i2c_device_id tas2764_i2c_id[] = {
{ "tas2764", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, tas2764_i2c_id);
#if defined(CONFIG_OF)
static const struct of_device_id tas2764_of_match[] = {
{ .compatible = "ti,tas2764" },
{},
};
MODULE_DEVICE_TABLE(of, tas2764_of_match);
#endif
static struct i2c_driver tas2764_i2c_driver = {
.driver = {
.name = "tas2764",
.of_match_table = of_match_ptr(tas2764_of_match),
},
.probe = tas2764_i2c_probe,
.id_table = tas2764_i2c_id,
};
module_i2c_driver(tas2764_i2c_driver);
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
MODULE_DESCRIPTION("TAS2764 I2C Smart Amplifier driver");
MODULE_LICENSE("GPL v2");
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