iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
7209d5ebb3
linux/sound/soc/codecs/max9867.c
Pavel Dobias 082d3c998c
ASoC: max9867: Implement exact integer mode 
For 8kHz and 16kHz sample rates and certain PCLK values
the codec can be programmed to operate in exact integer
mode. If available, use it to achieve the exact sample rate.

Signed-off-by: Pavel Dobias <dobias@2n.com>
Link: https://lore.kernel.org/r/20221123153818.24650-1-dobias@2n.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-11-28 13:04:34 +00:00

699 lines
20 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0
//
// MAX9867 ALSA SoC codec driver
//
// Copyright 2013-2015 Maxim Integrated Products
// Copyright 2018 Ladislav Michl <ladis@linux-mips.org>
//
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "max9867.h"
struct max9867_priv {
struct regmap *regmap;
const struct snd_pcm_hw_constraint_list *constraints;
unsigned int sysclk, pclk;
bool provider, dsp_a;
unsigned int adc_dac_active;
};
static const char *const max9867_spmode[] = {
"Stereo Diff", "Mono Diff",
"Stereo Cap", "Mono Cap",
"Stereo Single", "Mono Single",
"Stereo Single Fast", "Mono Single Fast"
};
static const char *const max9867_filter_text[] = {"IIR", "FIR"};
static const char *const max9867_adc_dac_filter_text[] = {
"Disabled",
"Elliptical/16/256",
"Butterworth/16/500",
"Elliptical/8/256",
"Butterworth/8/500",
"Butterworth/8-24"
};
enum max9867_adc_dac {
MAX9867_ADC_LEFT,
MAX9867_ADC_RIGHT,
MAX9867_DAC_LEFT,
MAX9867_DAC_RIGHT,
};
static int max9867_adc_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 max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
enum max9867_adc_dac adc_dac;
if (!strcmp(w->name, "ADCL"))
adc_dac = MAX9867_ADC_LEFT;
else if (!strcmp(w->name, "ADCR"))
adc_dac = MAX9867_ADC_RIGHT;
else if (!strcmp(w->name, "DACL"))
adc_dac = MAX9867_DAC_LEFT;
else if (!strcmp(w->name, "DACR"))
adc_dac = MAX9867_DAC_RIGHT;
else
return 0;
if (SND_SOC_DAPM_EVENT_ON(event))
max9867->adc_dac_active |= BIT(adc_dac);
else if (SND_SOC_DAPM_EVENT_OFF(event))
max9867->adc_dac_active &= ~BIT(adc_dac);
return 0;
}
static int max9867_filter_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
unsigned int reg;
int ret;
ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, &reg);
if (ret)
return -EINVAL;
if (reg & MAX9867_CODECFLTR_MODE)
ucontrol->value.enumerated.item[0] = 1;
else
ucontrol->value.enumerated.item[0] = 0;
return 0;
}
static int max9867_filter_set(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
unsigned int reg, mode = ucontrol->value.enumerated.item[0];
int ret;
if (mode > 1)
return -EINVAL;
/* don't allow change if ADC/DAC active */
if (max9867->adc_dac_active)
return -EBUSY;
/* read current filter mode */
ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, &reg);
if (ret)
return -EINVAL;
if (mode)
mode = MAX9867_CODECFLTR_MODE;
/* check if change is needed */
if ((reg & MAX9867_CODECFLTR_MODE) == mode)
return 0;
/* shutdown codec before switching filter mode */
regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_PWRMAN_SHDN, 0);
/* switch filter mode */
regmap_update_bits(max9867->regmap, MAX9867_CODECFLTR,
MAX9867_CODECFLTR_MODE, mode);
/* out of shutdown now */
regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_PWRMAN_SHDN, MAX9867_PWRMAN_SHDN);
return 0;
}
static SOC_ENUM_SINGLE_EXT_DECL(max9867_filter, max9867_filter_text);
static SOC_ENUM_SINGLE_DECL(max9867_dac_filter, MAX9867_CODECFLTR, 0,
max9867_adc_dac_filter_text);
static SOC_ENUM_SINGLE_DECL(max9867_adc_filter, MAX9867_CODECFLTR, 4,
max9867_adc_dac_filter_text);
static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0,
max9867_spmode);
static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_master_tlv,
0, 2, TLV_DB_SCALE_ITEM(-8600, 200, 1),
3, 17, TLV_DB_SCALE_ITEM(-7800, 400, 0),
18, 25, TLV_DB_SCALE_ITEM(-2000, 200, 0),
26, 34, TLV_DB_SCALE_ITEM( -500, 100, 0),
35, 40, TLV_DB_SCALE_ITEM( 350, 50, 0),
);
static DECLARE_TLV_DB_SCALE(max9867_mic_tlv, 0, 100, 0);
static DECLARE_TLV_DB_SCALE(max9867_line_tlv, -600, 200, 0);
static DECLARE_TLV_DB_SCALE(max9867_adc_tlv, -1200, 100, 0);
static DECLARE_TLV_DB_SCALE(max9867_dac_tlv, -1500, 100, 0);
static DECLARE_TLV_DB_SCALE(max9867_dacboost_tlv, 0, 600, 0);
static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_micboost_tlv,
0, 2, TLV_DB_SCALE_ITEM(-2000, 2000, 1),
3, 3, TLV_DB_SCALE_ITEM(3000, 0, 0),
);
static const struct snd_kcontrol_new max9867_snd_controls[] = {
SOC_DOUBLE_R_TLV("Master Playback Volume", MAX9867_LEFTVOL,
MAX9867_RIGHTVOL, 0, 40, 1, max9867_master_tlv),
SOC_DOUBLE_R_TLV("Line Capture Volume", MAX9867_LEFTLINELVL,
MAX9867_RIGHTLINELVL, 0, 15, 1, max9867_line_tlv),
SOC_DOUBLE_R_TLV("Mic Capture Volume", MAX9867_LEFTMICGAIN,
MAX9867_RIGHTMICGAIN, 0, 20, 1, max9867_mic_tlv),
SOC_DOUBLE_R_TLV("Mic Boost Capture Volume", MAX9867_LEFTMICGAIN,
MAX9867_RIGHTMICGAIN, 5, 3, 0, max9867_micboost_tlv),
SOC_SINGLE("Digital Sidetone Volume", MAX9867_SIDETONE, 0, 31, 1),
SOC_SINGLE_TLV("Digital Playback Volume", MAX9867_DACLEVEL, 0, 15, 1,
max9867_dac_tlv),
SOC_SINGLE_TLV("Digital Boost Playback Volume", MAX9867_DACLEVEL, 4, 3, 0,
max9867_dacboost_tlv),
SOC_DOUBLE_TLV("Digital Capture Volume", MAX9867_ADCLEVEL, 4, 0, 15, 1,
max9867_adc_tlv),
SOC_ENUM("Speaker Mode", max9867_spkmode),
SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0),
SOC_SINGLE("Line ZC Switch", MAX9867_MODECONFIG, 5, 1, 0),
SOC_ENUM_EXT("DSP Filter", max9867_filter, max9867_filter_get, max9867_filter_set),
SOC_ENUM("ADC Filter", max9867_adc_filter),
SOC_ENUM("DAC Filter", max9867_dac_filter),
SOC_SINGLE("Mono Playback Switch", MAX9867_IFC1B, 3, 1, 0),
};
/* Input mixer */
static const struct snd_kcontrol_new max9867_input_mixer_controls[] = {
SOC_DAPM_DOUBLE("Line Capture Switch", MAX9867_INPUTCONFIG, 7, 5, 1, 0),
SOC_DAPM_DOUBLE("Mic Capture Switch", MAX9867_INPUTCONFIG, 6, 4, 1, 0),
};
/* Output mixer */
static const struct snd_kcontrol_new max9867_output_mixer_controls[] = {
SOC_DAPM_DOUBLE_R("Line Bypass Switch",
MAX9867_LEFTLINELVL, MAX9867_RIGHTLINELVL, 6, 1, 1),
};
/* Sidetone mixer */
static const struct snd_kcontrol_new max9867_sidetone_mixer_controls[] = {
SOC_DAPM_DOUBLE("Sidetone Switch", MAX9867_SIDETONE, 6, 7, 1, 0),
};
/* Line out switch */
static const struct snd_kcontrol_new max9867_line_out_control =
SOC_DAPM_DOUBLE_R("Switch",
MAX9867_LEFTVOL, MAX9867_RIGHTVOL, 6, 1, 1);
/* DMIC mux */
static const char *const dmic_mux_text[] = {
"ADC", "DMIC"
};
static SOC_ENUM_SINGLE_DECL(left_dmic_mux_enum,
MAX9867_MICCONFIG, 5, dmic_mux_text);
static SOC_ENUM_SINGLE_DECL(right_dmic_mux_enum,
MAX9867_MICCONFIG, 4, dmic_mux_text);
static const struct snd_kcontrol_new max9867_left_dmic_mux =
SOC_DAPM_ENUM("DMICL Mux", left_dmic_mux_enum);
static const struct snd_kcontrol_new max9867_right_dmic_mux =
SOC_DAPM_ENUM("DMICR Mux", right_dmic_mux_enum);
static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("MICL"),
SND_SOC_DAPM_INPUT("MICR"),
SND_SOC_DAPM_INPUT("DMICL"),
SND_SOC_DAPM_INPUT("DMICR"),
SND_SOC_DAPM_INPUT("LINL"),
SND_SOC_DAPM_INPUT("LINR"),
SND_SOC_DAPM_PGA("Left Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_PGA("Right Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
max9867_input_mixer_controls,
ARRAY_SIZE(max9867_input_mixer_controls)),
SND_SOC_DAPM_MUX("DMICL Mux", SND_SOC_NOPM, 0, 0,
&max9867_left_dmic_mux),
SND_SOC_DAPM_MUX("DMICR Mux", SND_SOC_NOPM, 0, 0,
&max9867_right_dmic_mux),
SND_SOC_DAPM_ADC_E("ADCL", "HiFi Capture", SND_SOC_NOPM, 0, 0,
max9867_adc_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_ADC_E("ADCR", "HiFi Capture", SND_SOC_NOPM, 0, 0,
max9867_adc_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_MIXER("Digital", SND_SOC_NOPM, 0, 0,
max9867_sidetone_mixer_controls,
ARRAY_SIZE(max9867_sidetone_mixer_controls)),
SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", SND_SOC_NOPM, 0, 0,
max9867_output_mixer_controls,
ARRAY_SIZE(max9867_output_mixer_controls)),
SND_SOC_DAPM_DAC_E("DACL", "HiFi Playback", SND_SOC_NOPM, 0, 0,
max9867_adc_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_DAC_E("DACR", "HiFi Playback", SND_SOC_NOPM, 0, 0,
max9867_adc_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_SWITCH("Master Playback", SND_SOC_NOPM, 0, 0,
&max9867_line_out_control),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("ROUT"),
};
static const struct snd_soc_dapm_route max9867_audio_map[] = {
{"Left Line Input", NULL, "LINL"},
{"Right Line Input", NULL, "LINR"},
{"Input Mixer", "Mic Capture Switch", "MICL"},
{"Input Mixer", "Mic Capture Switch", "MICR"},
{"Input Mixer", "Line Capture Switch", "Left Line Input"},
{"Input Mixer", "Line Capture Switch", "Right Line Input"},
{"DMICL Mux", "DMIC", "DMICL"},
{"DMICR Mux", "DMIC", "DMICR"},
{"DMICL Mux", "ADC", "Input Mixer"},
{"DMICR Mux", "ADC", "Input Mixer"},
{"ADCL", NULL, "DMICL Mux"},
{"ADCR", NULL, "DMICR Mux"},
{"Digital", "Sidetone Switch", "ADCL"},
{"Digital", "Sidetone Switch", "ADCR"},
{"DACL", NULL, "Digital"},
{"DACR", NULL, "Digital"},
{"Output Mixer", "Line Bypass Switch", "Left Line Input"},
{"Output Mixer", "Line Bypass Switch", "Right Line Input"},
{"Output Mixer", NULL, "DACL"},
{"Output Mixer", NULL, "DACR"},
{"Master Playback", "Switch", "Output Mixer"},
{"LOUT", NULL, "Master Playback"},
{"ROUT", NULL, "Master Playback"},
};
static const unsigned int max9867_rates_44k1[] = {
11025, 22050, 44100,
};
static const struct snd_pcm_hw_constraint_list max9867_constraints_44k1 = {
.list = max9867_rates_44k1,
.count = ARRAY_SIZE(max9867_rates_44k1),
};
static const unsigned int max9867_rates_48k[] = {
8000, 16000, 32000, 48000,
};
static const struct snd_pcm_hw_constraint_list max9867_constraints_48k = {
.list = max9867_rates_48k,
.count = ARRAY_SIZE(max9867_rates_48k),
};
static int max9867_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct max9867_priv *max9867 =
snd_soc_component_get_drvdata(dai->component);
if (max9867->constraints)
snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE, max9867->constraints);
return 0;
}
static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
int value, freq = 0;
unsigned long int rate, ratio;
struct snd_soc_component *component = dai->component;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
unsigned int ni = DIV_ROUND_CLOSEST_ULL(96ULL * 0x10000 * params_rate(params),
max9867->pclk);
/* set up the ni value */
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
MAX9867_NI_HIGH_MASK, (0xFF00 & ni) >> 8);
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
MAX9867_NI_LOW_MASK, 0x00FF & ni);
if (max9867->provider) {
if (max9867->dsp_a) {
value = MAX9867_IFC1B_48X;
} else {
rate = params_rate(params) * 2 * params_width(params);
ratio = max9867->pclk / rate;
switch (params_width(params)) {
case 8:
case 16:
switch (ratio) {
case 2:
value = MAX9867_IFC1B_PCLK_2;
break;
case 4:
value = MAX9867_IFC1B_PCLK_4;
break;
case 8:
value = MAX9867_IFC1B_PCLK_8;
break;
case 16:
value = MAX9867_IFC1B_PCLK_16;
break;
default:
return -EINVAL;
}
break;
case 24:
value = MAX9867_IFC1B_48X;
break;
case 32:
value = MAX9867_IFC1B_64X;
break;
default:
return -EINVAL;
}
}
regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
MAX9867_IFC1B_BCLK_MASK, value);
/* Exact integer mode available for 8kHz and 16kHz sample rates
* and certain PCLK (prescaled MCLK) values.
*/
if (params_rate(params) == 8000 ||
params_rate(params) == 16000) {
switch (max9867->pclk) {
case 12000000:
freq = 0x08;
break;
case 13000000:
freq = 0x0A;
break;
case 16000000:
freq = 0x0C;
break;
case 19200000:
freq = 0x0E;
break;
}
}
if (freq && params_rate(params) == 16000)
freq++;
/* If exact integer mode not available, the freq value
* remains zero, i.e. normal mode is used.
*/
regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
MAX9867_FREQ_MASK, freq);
} else {
/*
* digital pll locks on to any externally supplied LRCLK signal
* and also enable rapid lock mode.
*/
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
MAX9867_PLL, MAX9867_PLL);
}
return 0;
}
static int max9867_mute(struct snd_soc_dai *dai, int mute, int direction)
{
struct snd_soc_component *component = dai->component;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
return regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
1 << 6, !!mute << 6);
}
static int max9867_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 max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
int value = 0;
/* Set the prescaler based on the master clock frequency*/
if (freq >= 10000000 && freq <= 20000000) {
value |= MAX9867_PSCLK_10_20;
max9867->pclk = freq;
} else if (freq >= 20000000 && freq <= 40000000) {
value |= MAX9867_PSCLK_20_40;
max9867->pclk = freq / 2;
} else if (freq >= 40000000 && freq <= 60000000) {
value |= MAX9867_PSCLK_40_60;
max9867->pclk = freq / 4;
} else {
dev_err(component->dev,
"Invalid clock frequency %uHz (required 10-60MHz)\n",
freq);
return -EINVAL;
}
if (freq % 48000 == 0)
max9867->constraints = &max9867_constraints_48k;
else if (freq % 44100 == 0)
max9867->constraints = &max9867_constraints_44k1;
else
dev_warn(component->dev,
"Unable to set exact rate with %uHz clock frequency\n",
freq);
max9867->sysclk = freq;
value = value << MAX9867_PSCLK_SHIFT;
regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
MAX9867_PSCLK_MASK, value);
return 0;
}
static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
u8 iface1A, iface1B;
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_CBP_CFP:
max9867->provider = true;
iface1A = MAX9867_MASTER;
iface1B = MAX9867_IFC1B_48X;
break;
case SND_SOC_DAIFMT_CBC_CFC:
max9867->provider = false;
iface1A = iface1B = 0;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
max9867->dsp_a = false;
iface1A |= MAX9867_I2S_DLY;
break;
case SND_SOC_DAIFMT_DSP_A:
max9867->dsp_a = true;
iface1A |= MAX9867_TDM_MODE | MAX9867_SDOUT_HIZ;
break;
default:
return -EINVAL;
}
/* Clock inversion bits, BCI and WCI */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE;
break;
case SND_SOC_DAIFMT_IB_NF:
iface1A |= MAX9867_BCI_MODE;
break;
case SND_SOC_DAIFMT_NB_IF:
iface1A |= MAX9867_WCI_MODE;
break;
default:
return -EINVAL;
}
regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);
regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
MAX9867_IFC1B_BCLK_MASK, iface1B);
return 0;
}
static const struct snd_soc_dai_ops max9867_dai_ops = {
.set_sysclk = max9867_set_dai_sysclk,
.set_fmt = max9867_dai_set_fmt,
.mute_stream = max9867_mute,
.startup = max9867_startup,
.hw_params = max9867_dai_hw_params,
.no_capture_mute = 1,
};
static struct snd_soc_dai_driver max9867_dai[] = {
{
.name = "max9867-aif1",
.playback = {
.stream_name = "HiFi Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.stream_name = "HiFi Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &max9867_dai_ops,
.symmetric_rate = 1,
}
};
#ifdef CONFIG_PM
static int max9867_suspend(struct snd_soc_component *component)
{
snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
return 0;
}
static int max9867_resume(struct snd_soc_component *component)
{
snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
return 0;
}
#else
#define max9867_suspend NULL
#define max9867_resume NULL
#endif
static int max9867_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
int err;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
switch (level) {
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
err = regcache_sync(max9867->regmap);
if (err)
return err;
err = regmap_write(max9867->regmap,
MAX9867_PWRMAN, 0xff);
if (err)
return err;
}
break;
case SND_SOC_BIAS_OFF:
err = regmap_write(max9867->regmap, MAX9867_PWRMAN, 0);
if (err)
return err;
regcache_mark_dirty(max9867->regmap);
break;
default:
break;
}
return 0;
}
static const struct snd_soc_component_driver max9867_component = {
.controls = max9867_snd_controls,
.num_controls = ARRAY_SIZE(max9867_snd_controls),
.dapm_routes = max9867_audio_map,
.num_dapm_routes = ARRAY_SIZE(max9867_audio_map),
.dapm_widgets = max9867_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets),
.suspend = max9867_suspend,
.resume = max9867_resume,
.set_bias_level = max9867_set_bias_level,
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static bool max9867_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX9867_STATUS:
case MAX9867_JACKSTATUS:
case MAX9867_AUXHIGH:
case MAX9867_AUXLOW:
return true;
default:
return false;
}
}
static const struct regmap_config max9867_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX9867_REVISION,
.volatile_reg = max9867_volatile_register,
.cache_type = REGCACHE_RBTREE,
};
static int max9867_i2c_probe(struct i2c_client *i2c)
{
struct max9867_priv *max9867;
int ret, reg;
max9867 = devm_kzalloc(&i2c->dev, sizeof(*max9867), GFP_KERNEL);
if (!max9867)
return -ENOMEM;
i2c_set_clientdata(i2c, max9867);
max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap);
if (IS_ERR(max9867->regmap)) {
ret = PTR_ERR(max9867->regmap);
dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
return ret;
}
ret = regmap_read(max9867->regmap, MAX9867_REVISION, &reg);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to read: %d\n", ret);
return ret;
}
dev_info(&i2c->dev, "device revision: %x\n", reg);
ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component,
max9867_dai, ARRAY_SIZE(max9867_dai));
if (ret < 0)
dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
return ret;
}
static const struct i2c_device_id max9867_i2c_id[] = {
{ "max9867", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max9867_i2c_id);
#ifdef CONFIG_OF
static const struct of_device_id max9867_of_match[] = {
{ .compatible = "maxim,max9867", },
{ }
};
MODULE_DEVICE_TABLE(of, max9867_of_match);
#endif
static struct i2c_driver max9867_i2c_driver = {
.driver = {
.name = "max9867",
.of_match_table = of_match_ptr(max9867_of_match),
},
.probe_new = max9867_i2c_probe,
.id_table = max9867_i2c_id,
};
module_i2c_driver(max9867_i2c_driver);
MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>");
MODULE_DESCRIPTION("ASoC MAX9867 driver");
MODULE_LICENSE("GPL");
Reference in New Issue View Git Blame Copy Permalink